multica/server/pkg/db/generated/channel.sql.go

// Code generated by sqlc. DO NOT EDIT.
// versions:
//   sqlc v1.31.1
// source: channel.sql

package db

import (
	"context"

	"github.com/jackc/pgx/v5/pgtype"
)

const acquireChannelWSLease = `-- name: AcquireChannelWSLease :one
UPDATE channel_installation
SET ws_lease_token       = $1,
    ws_lease_expires_at  = $2,
    updated_at           = now()
WHERE id = $3
  AND status = 'active'
  AND (
        ws_lease_token IS NULL
        OR ws_lease_expires_at < now()
        OR ws_lease_token = $1
  )
RETURNING id, workspace_id, agent_id, channel_type, config, status, ws_lease_token, ws_lease_expires_at, installer_user_id, installed_at, created_at, updated_at
`

type AcquireChannelWSLeaseParams struct {
	NewToken     pgtype.Text        `json:"new_token"`
	NewExpiresAt pgtype.Timestamptz `json:"new_expires_at"`
	ID           pgtype.UUID        `json:"id"`
}

// Atomically claims the WebSocket lease. CAS predicate accepts when no
// holder exists, the holder expired, or the holder is us (renewal).
func (q *Queries) AcquireChannelWSLease(ctx context.Context, arg AcquireChannelWSLeaseParams) (ChannelInstallation, error) {
	row := q.db.QueryRow(ctx, acquireChannelWSLease, arg.NewToken, arg.NewExpiresAt, arg.ID)
	var i ChannelInstallation
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.AgentID,
		&i.ChannelType,
		&i.Config,
		&i.Status,
		&i.WsLeaseToken,
		&i.WsLeaseExpiresAt,
		&i.InstallerUserID,
		&i.InstalledAt,
		&i.CreatedAt,
		&i.UpdatedAt,
	)
	return i, err
}

const backfillChannelInstallationRegionToFeishuLark = `-- name: BackfillChannelInstallationRegionToFeishuLark :execrows
UPDATE channel_installation
SET config     = jsonb_set(config, '{region}', '"lark"'),
    updated_at = now()
WHERE channel_type = 'feishu'
  AND config ->> 'region' = 'feishu'
`

// Operator repair, feishu-only: flip every feishu installation still
// carrying region='feishu' to 'lark'. Called only on deployments whose
// legacy global base-URL override pointed at Lark international. Idempotent.
func (q *Queries) BackfillChannelInstallationRegionToFeishuLark(ctx context.Context) (int64, error) {
	result, err := q.db.Exec(ctx, backfillChannelInstallationRegionToFeishuLark)
	if err != nil {
		return 0, err
	}
	return result.RowsAffected(), nil
}

const channelMediaObjectIsReferenced = `-- name: ChannelMediaObjectIsReferenced :one
SELECT EXISTS (
    SELECT 1 FROM attachment
    WHERE chat_message_id = $1
      AND workspace_id = $2
      AND url = $3
) AS referenced
`

type ChannelMediaObjectIsReferencedParams struct {
	ChatMessageID pgtype.UUID `json:"chat_message_id"`
	WorkspaceID   pgtype.UUID `json:"workspace_id"`
	StorageUrl    string      `json:"storage_url"`
}

// The post-claim reference check: an attachment row carrying this object's
// URL on the intended message. Only meaningful AFTER the claim flipped the
// row to 'deleting' — from that point a bind can no longer succeed on the
// key, so a negative answer is terminal, not a snapshot race. Re-run on every
// tombstone pass as well: a positive answer there is an invariant violation,
// and the object is kept and reported rather than deleted.
func (q *Queries) ChannelMediaObjectIsReferenced(ctx context.Context, arg ChannelMediaObjectIsReferencedParams) (bool, error) {
	row := q.db.QueryRow(ctx, channelMediaObjectIsReferenced, arg.ChatMessageID, arg.WorkspaceID, arg.StorageUrl)
	var referenced bool
	err := row.Scan(&referenced)
	return referenced, err
}

const claimChannelInboundDedup = `-- name: ClaimChannelInboundDedup :one

INSERT INTO channel_inbound_message_dedup (installation_id, message_id, claim_token)
VALUES ($1, $2, gen_random_uuid())
ON CONFLICT (installation_id, message_id) DO UPDATE
    SET received_at = now(),
        claim_token = gen_random_uuid()
    WHERE channel_inbound_message_dedup.processed_at IS NULL
      AND channel_inbound_message_dedup.received_at < now() - INTERVAL '60 seconds'
RETURNING installation_id, message_id, received_at, processed_at, claim_token
`

type ClaimChannelInboundDedupParams struct {
	InstallationID pgtype.UUID `json:"installation_id"`
	MessageID      string      `json:"message_id"`
}

// =====================
// channel_inbound_message_dedup
// =====================
// Two-phase idempotency gate with owner fencing. Returns the row when a
// claim is acquired (fresh insert, or stale-reclaim of an in-flight claim
// older than 60s); returns no rows when terminal (processed) or actively
// in-flight. Every claim mints a fresh claim_token; Mark/Release are
// fenced on it. See the table comment in migration 124 / the lark
// predecessor for the full invariant set.
func (q *Queries) ClaimChannelInboundDedup(ctx context.Context, arg ClaimChannelInboundDedupParams) (ChannelInboundMessageDedup, error) {
	row := q.db.QueryRow(ctx, claimChannelInboundDedup, arg.InstallationID, arg.MessageID)
	var i ChannelInboundMessageDedup
	err := row.Scan(
		&i.InstallationID,
		&i.MessageID,
		&i.ReceivedAt,
		&i.ProcessedAt,
		&i.ClaimToken,
	)
	return i, err
}

const claimChannelMediaPendingObjectsForBind = `-- name: ClaimChannelMediaPendingObjectsForBind :many
DELETE FROM channel_media_pending_object
WHERE storage_key = ANY($1::text[])
  AND workspace_id = $2
  AND state = 'pending'
RETURNING storage_key
`

type ClaimChannelMediaPendingObjectsForBindParams struct {
	StorageKeys []string    `json:"storage_keys"`
	WorkspaceID pgtype.UUID `json:"workspace_id"`
}

// Runs inside the attachment-insert transaction: commit landed ⇔ the intents
// are gone, atomically, so an ambiguous COMMIT never needs adjudication. Only
// 'pending' rows can be claimed — a key the reconciler moved to 'deleting'
// is NOT returned, and the caller must skip attaching that object (the
// placeholder stays; the reconciler will delete the object).
func (q *Queries) ClaimChannelMediaPendingObjectsForBind(ctx context.Context, arg ClaimChannelMediaPendingObjectsForBindParams) ([]string, error) {
	rows, err := q.db.Query(ctx, claimChannelMediaPendingObjectsForBind, arg.StorageKeys, arg.WorkspaceID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	items := []string{}
	for rows.Next() {
		var storage_key string
		if err := rows.Scan(&storage_key); err != nil {
			return nil, err
		}
		items = append(items, storage_key)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const claimNextChannelMediaPendingObjectForReconcile = `-- name: ClaimNextChannelMediaPendingObjectForReconcile :one
UPDATE channel_media_pending_object AS obj
SET state = CASE WHEN obj.state = 'tombstoned' THEN 'tombstoned' ELSE 'deleting' END,
    lease_token = $1,
    lease_expires_at = now() + $2::interval,
    attempt = obj.attempt + 1
FROM (
    SELECT cand.storage_key FROM channel_media_pending_object AS cand
    WHERE cand.next_attempt_at <= now()
      AND (
          (cand.state = 'pending' AND cand.created_at <= now() - $3::interval)
          OR (cand.state = 'deleting' AND (cand.lease_expires_at IS NULL OR cand.lease_expires_at <= now()))
          OR (cand.state = 'tombstoned' AND (cand.lease_expires_at IS NULL OR cand.lease_expires_at <= now()))
      )
    ORDER BY cand.next_attempt_at
    LIMIT 1
    FOR UPDATE SKIP LOCKED
) AS due
WHERE obj.storage_key = due.storage_key
RETURNING obj.storage_key, obj.workspace_id, obj.chat_message_id, obj.storage_url, obj.installation_id, obj.state, obj.lease_token, obj.lease_expires_at, obj.attempt, obj.next_attempt_at, obj.last_error, obj.tombstone_pass, obj.created_at
`

type ClaimNextChannelMediaPendingObjectForReconcileParams struct {
	LeaseToken  pgtype.UUID     `json:"lease_token"`
	Lease       pgtype.Interval `json:"lease"`
	SettleDelay pgtype.Interval `json:"settle_delay"`
}

// Short-transaction claim of ONE due row, taken immediately before that row is
// settled. Claiming a whole batch up front made the claim a promise the sweep
// might not keep: a tail row sat in 'deleting' with attempt already bumped
// while earlier rows ran, and could expire and be reclaimed before its own
// DELETE was ever tried, inflating attempt/backoff for work that never
// happened. One row per claim means attempt counts attempts.
//
// Due means (a) 'pending' rows older than the settle delay — an operational
// buffer only; correctness comes from the state flip, after which a bind can
// never succeed on the key — or (b) 'deleting' rows whose lease expired (a
// crashed or failed worker) — or (c) tombstones: the object was deleted, but a
// PUT the client abandoned may still materialize it afterwards, so each due
// tombstone gets another idempotent delete before the row is finally dropped.
// FOR UPDATE SKIP LOCKED keeps replicas off each other's row; the
// object-storage DELETE happens outside any transaction, gated by the lease
// token. No row (ErrNoRows) means nothing is due — the sweep is done.
func (q *Queries) ClaimNextChannelMediaPendingObjectForReconcile(ctx context.Context, arg ClaimNextChannelMediaPendingObjectForReconcileParams) (ChannelMediaPendingObject, error) {
	row := q.db.QueryRow(ctx, claimNextChannelMediaPendingObjectForReconcile, arg.LeaseToken, arg.Lease, arg.SettleDelay)
	var i ChannelMediaPendingObject
	err := row.Scan(
		&i.StorageKey,
		&i.WorkspaceID,
		&i.ChatMessageID,
		&i.StorageUrl,
		&i.InstallationID,
		&i.State,
		&i.LeaseToken,
		&i.LeaseExpiresAt,
		&i.Attempt,
		&i.NextAttemptAt,
		&i.LastError,
		&i.TombstonePass,
		&i.CreatedAt,
	)
	return i, err
}

const consumeChannelBindingToken = `-- name: ConsumeChannelBindingToken :one
UPDATE channel_binding_token
SET consumed_at = now()
WHERE token_hash = $1
  AND consumed_at IS NULL
  AND expires_at > now()
RETURNING token_hash, workspace_id, installation_id, channel_type, channel_user_id, expires_at, consumed_at, created_at
`

// Atomic redemption: returns the row only if the hash exists, is
// unconsumed, and unexpired. Two simultaneous redemptions cannot both win.
func (q *Queries) ConsumeChannelBindingToken(ctx context.Context, tokenHash string) (ChannelBindingToken, error) {
	row := q.db.QueryRow(ctx, consumeChannelBindingToken, tokenHash)
	var i ChannelBindingToken
	err := row.Scan(
		&i.TokenHash,
		&i.WorkspaceID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelUserID,
		&i.ExpiresAt,
		&i.ConsumedAt,
		&i.CreatedAt,
	)
	return i, err
}

const countChannelMediaPendingObjects = `-- name: CountChannelMediaPendingObjects :one
SELECT
    count(*) FILTER (WHERE state <> 'tombstoned') AS pending_objects,
    count(*) FILTER (WHERE state = 'tombstoned') AS tombstoned_objects
FROM channel_media_pending_object
`

type CountChannelMediaPendingObjectsRow struct {
	PendingObjects    int64 `json:"pending_objects"`
	TombstonedObjects int64 `json:"tombstoned_objects"`
}

// Ledger backlog gauge for the reconciler's observability. Tombstones are
// reported separately: they are bounded bookkeeping for already-deleted
// objects, not a backlog of objects awaiting reclaim.
func (q *Queries) CountChannelMediaPendingObjects(ctx context.Context) (CountChannelMediaPendingObjectsRow, error) {
	row := q.db.QueryRow(ctx, countChannelMediaPendingObjects)
	var i CountChannelMediaPendingObjectsRow
	err := row.Scan(&i.PendingObjects, &i.TombstonedObjects)
	return i, err
}

const createChannelBindingToken = `-- name: CreateChannelBindingToken :one

INSERT INTO channel_binding_token (
    token_hash, workspace_id, installation_id, channel_type,
    channel_user_id, expires_at
) VALUES (
    $1, $2, $3, $4, $5,
    LEAST($6::timestamptz, now() + INTERVAL '15 minutes')
)
RETURNING token_hash, workspace_id, installation_id, channel_type, channel_user_id, expires_at, consumed_at, created_at
`

type CreateChannelBindingTokenParams struct {
	TokenHash      string             `json:"token_hash"`
	WorkspaceID    pgtype.UUID        `json:"workspace_id"`
	InstallationID pgtype.UUID        `json:"installation_id"`
	ChannelType    string             `json:"channel_type"`
	ChannelUserID  string             `json:"channel_user_id"`
	ExpiresAt      pgtype.Timestamptz `json:"expires_at"`
}

// =====================
// channel_binding_token
// =====================
// Mints a single-use binding token for an unbound platform user. TTL cap
// (15 min) enforced by the table CHECK in lockstep with
// channel.BindingTokenTTL. Clamp against the database clock so small clock
// skew between an app node and Postgres cannot reject an otherwise valid
// 15-minute token. The HASH is stored, never the raw token.
func (q *Queries) CreateChannelBindingToken(ctx context.Context, arg CreateChannelBindingTokenParams) (ChannelBindingToken, error) {
	row := q.db.QueryRow(ctx, createChannelBindingToken,
		arg.TokenHash,
		arg.WorkspaceID,
		arg.InstallationID,
		arg.ChannelType,
		arg.ChannelUserID,
		arg.ExpiresAt,
	)
	var i ChannelBindingToken
	err := row.Scan(
		&i.TokenHash,
		&i.WorkspaceID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelUserID,
		&i.ExpiresAt,
		&i.ConsumedAt,
		&i.CreatedAt,
	)
	return i, err
}

const createChannelChatSessionBinding = `-- name: CreateChannelChatSessionBinding :one

INSERT INTO channel_chat_session_binding (
    chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, config
) VALUES (
    $1, $2, $3, $4, $5, $6
)
RETURNING id, chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, last_message_id, last_thread_id, config, created_at
`

type CreateChannelChatSessionBindingParams struct {
	ChatSessionID  pgtype.UUID `json:"chat_session_id"`
	InstallationID pgtype.UUID `json:"installation_id"`
	ChannelType    string      `json:"channel_type"`
	ChannelChatID  string      `json:"channel_chat_id"`
	ChatType       string      `json:"chat_type"`
	Config         []byte      `json:"config"`
}

// =====================
// channel_chat_session_binding
// =====================
// channel_chat_id is the session-isolation key (one chat_session per
// (installation_id, channel_chat_id)): Feishu passes the chat id; Slack passes
// a stable key that, for channels, includes the thread root so each @bot thread
// is its own session. config carries any platform-specific outbound routing the
// key alone does not (e.g. Slack's real channel_id when the key is composite);
// it is opaque to the shared session service.
func (q *Queries) CreateChannelChatSessionBinding(ctx context.Context, arg CreateChannelChatSessionBindingParams) (ChannelChatSessionBinding, error) {
	row := q.db.QueryRow(ctx, createChannelChatSessionBinding,
		arg.ChatSessionID,
		arg.InstallationID,
		arg.ChannelType,
		arg.ChannelChatID,
		arg.ChatType,
		arg.Config,
	)
	var i ChannelChatSessionBinding
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChatType,
		&i.LastMessageID,
		&i.LastThreadID,
		&i.Config,
		&i.CreatedAt,
	)
	return i, err
}

const createChannelOutboundCardMessage = `-- name: CreateChannelOutboundCardMessage :one

INSERT INTO channel_outbound_card_message (
    chat_session_id, task_id, channel_type, channel_chat_id,
    channel_card_message_id, status
) VALUES (
    $1, $6, $2, $3, $4, $5
)
RETURNING id, chat_session_id, task_id, channel_type, channel_chat_id, channel_card_message_id, status, last_patched_at, created_at
`

type CreateChannelOutboundCardMessageParams struct {
	ChatSessionID        pgtype.UUID `json:"chat_session_id"`
	ChannelType          string      `json:"channel_type"`
	ChannelChatID        string      `json:"channel_chat_id"`
	ChannelCardMessageID string      `json:"channel_card_message_id"`
	Status               string      `json:"status"`
	TaskID               pgtype.UUID `json:"task_id"`
}

// =====================
// channel_outbound_card_message
// =====================
func (q *Queries) CreateChannelOutboundCardMessage(ctx context.Context, arg CreateChannelOutboundCardMessageParams) (ChannelOutboundCardMessage, error) {
	row := q.db.QueryRow(ctx, createChannelOutboundCardMessage,
		arg.ChatSessionID,
		arg.ChannelType,
		arg.ChannelChatID,
		arg.ChannelCardMessageID,
		arg.Status,
		arg.TaskID,
	)
	var i ChannelOutboundCardMessage
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.TaskID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChannelCardMessageID,
		&i.Status,
		&i.LastPatchedAt,
		&i.CreatedAt,
	)
	return i, err
}

const createChannelUserBinding = `-- name: CreateChannelUserBinding :one

INSERT INTO channel_user_binding (
    workspace_id, multica_user_id, installation_id,
    channel_type, channel_user_id, config
) VALUES (
    $1, $2, $3, $4, $5, $6
)
ON CONFLICT (installation_id, channel_user_id) DO UPDATE SET
    -- jsonb_strip_nulls(EXCLUDED.config) preserves the old lark semantics
    -- ` + "`" + `union_id = COALESCE(EXCLUDED.union_id, lark_user_binding.union_id)` + "`" + `:
    -- a re-bind that carries ` + "`" + `{"union_id": null}` + "`" + ` (or omits the key) must NOT
    -- erase a union_id we already captured. Only non-null incoming keys win.
    config   = channel_user_binding.config || jsonb_strip_nulls(EXCLUDED.config),
    bound_at = now()
WHERE channel_user_binding.multica_user_id = EXCLUDED.multica_user_id
RETURNING id, workspace_id, multica_user_id, installation_id, channel_type, channel_user_id, config, bound_at
`

type CreateChannelUserBindingParams struct {
	WorkspaceID    pgtype.UUID `json:"workspace_id"`
	MulticaUserID  pgtype.UUID `json:"multica_user_id"`
	InstallationID pgtype.UUID `json:"installation_id"`
	ChannelType    string      `json:"channel_type"`
	ChannelUserID  string      `json:"channel_user_id"`
	Config         []byte      `json:"config"`
}

// =====================
// channel_user_binding
// =====================
// Records that a platform user id (per-installation; Feishu open_id) maps
// to a Multica user. The old composite member-FK is gone, so this no
// longer fails when the redeemer is not a workspace member — the caller
// (BindingTokenService.RedeemAndBind) validates membership explicitly
// before calling. ON CONFLICT DO UPDATE is still gated on multica_user_id
// matching, so a second redeemer cannot steal an already-bound user id;
// a cross-user conflict updates zero rows and the caller maps that to
// ErrBindingAlreadyAssigned. config carries secondary identity (union_id).
func (q *Queries) CreateChannelUserBinding(ctx context.Context, arg CreateChannelUserBindingParams) (ChannelUserBinding, error) {
	row := q.db.QueryRow(ctx, createChannelUserBinding,
		arg.WorkspaceID,
		arg.MulticaUserID,
		arg.InstallationID,
		arg.ChannelType,
		arg.ChannelUserID,
		arg.Config,
	)
	var i ChannelUserBinding
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.MulticaUserID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelUserID,
		&i.Config,
		&i.BoundAt,
	)
	return i, err
}

const deleteChannelBindingTokensByInstallation = `-- name: DeleteChannelBindingTokensByInstallation :exec
DELETE FROM channel_binding_token
WHERE installation_id = $1
`

// Application-layer integrity (schema has no FK/cascade, MUL-3515 §4): drop
// every pending binding token for an installation that is being hard-deleted.
// A token stays redeemable for up to 15 min; without this a user who clicks a
// still-unexpired bind link right after the bot was rebound to another agent
// would consume the token and get a "bound" result written against a deleted
// installation — a link that never actually reaches the live bot.
func (q *Queries) DeleteChannelBindingTokensByInstallation(ctx context.Context, installationID pgtype.UUID) error {
	_, err := q.db.Exec(ctx, deleteChannelBindingTokensByInstallation, installationID)
	return err
}

const deleteChannelChatSessionBindingBySession = `-- name: DeleteChannelChatSessionBindingBySession :exec
DELETE FROM channel_chat_session_binding
WHERE chat_session_id = $1
`

// Application-layer integrity (replaces the old chat_session-FK ON DELETE
// CASCADE): drop the binding when its chat_session is deleted.
func (q *Queries) DeleteChannelChatSessionBindingBySession(ctx context.Context, chatSessionID pgtype.UUID) error {
	_, err := q.db.Exec(ctx, deleteChannelChatSessionBindingBySession, chatSessionID)
	return err
}

const deleteChannelChatSessionBindingsByInstallation = `-- name: DeleteChannelChatSessionBindingsByInstallation :exec
DELETE FROM channel_chat_session_binding
WHERE installation_id = $1 AND channel_type = $2
`

type DeleteChannelChatSessionBindingsByInstallationParams struct {
	InstallationID pgtype.UUID `json:"installation_id"`
	ChannelType    string      `json:"channel_type"`
}

// Retire every chat-session binding for an installation. Used when an
// installation is re-pointed to a different agent (Slack re-connect): each
// existing chat_session is permanently tied to the agent it was created under,
// so reusing it would keep routing the conversation to the OLD agent. Dropping
// the bindings forces the next inbound message to create a fresh session under
// the new agent. The chat_session rows are preserved for history; only the
// channel binding is removed.
func (q *Queries) DeleteChannelChatSessionBindingsByInstallation(ctx context.Context, arg DeleteChannelChatSessionBindingsByInstallationParams) error {
	_, err := q.db.Exec(ctx, deleteChannelChatSessionBindingsByInstallation, arg.InstallationID, arg.ChannelType)
	return err
}

const deleteChannelInstallationsBySystemRuntimeAgents = `-- name: DeleteChannelInstallationsBySystemRuntimeAgents :exec
WITH doomed AS (
    SELECT id FROM channel_installation
    WHERE agent_id IN (
        SELECT id FROM agent WHERE runtime_id = $1 AND kind = 'system'
    )
),
cleared_chat_sessions AS (
    DELETE FROM channel_chat_session_binding WHERE installation_id IN (SELECT id FROM doomed)
    RETURNING chat_session_id
),
cleared_outbound_cards AS (
    -- Reach channel_outbound_card_message (keyed by chat_session_id, no FK)
    -- through the just-removed chat-session bindings, same as the reclaim path.
    DELETE FROM channel_outbound_card_message
    WHERE chat_session_id IN (SELECT chat_session_id FROM cleared_chat_sessions)
),
cleared_binding_tokens AS (
    DELETE FROM channel_binding_token WHERE installation_id IN (SELECT id FROM doomed)
),
cleared_user_bindings AS (
    DELETE FROM channel_user_binding WHERE installation_id IN (SELECT id FROM doomed)
),
cleared_inbound_dedup AS (
    DELETE FROM channel_inbound_message_dedup WHERE installation_id IN (SELECT id FROM doomed)
),
cleared_audit AS (
    -- Hard delete: purge audit rows rather than detaching them into permanently
    -- unattributable NULL rows (channel_inbound_audit has no workspace_id / reaper).
    DELETE FROM channel_inbound_audit WHERE installation_id IN (SELECT id FROM doomed)
)
DELETE FROM channel_installation WHERE id IN (SELECT id FROM doomed)
`

// Application-layer replacement for the (deliberately absent, MUL-3515 §4)
// workspace/agent ON DELETE CASCADE: on runtime teardown, before the system
// agents are hard-deleted, remove every channel installation they own — plus all
// of each installation's dependent rows — so no orphaned installation keeps
// occupying its bot's (channel_type, app_id) routing slot after its agent is gone
// (#4810). MUST run in the same tx as, and BEFORE, DeleteSystemAgentsByRuntime.
// Mirrors the agent hard-delete predicate (runtime_id, kind = 'system') exactly.
//
// Scoped to kind = 'system' since MUL-5559: a user agent now survives its
// runtime's deletion as an unbound agent, so tearing down its installations
// here would take a working bot away from an agent that is still there.
func (q *Queries) DeleteChannelInstallationsBySystemRuntimeAgents(ctx context.Context, runtimeID pgtype.UUID) error {
	_, err := q.db.Exec(ctx, deleteChannelInstallationsBySystemRuntimeAgents, runtimeID)
	return err
}

const deleteChannelMediaPendingObject = `-- name: DeleteChannelMediaPendingObject :execrows
DELETE FROM channel_media_pending_object
WHERE storage_key = $1
  AND workspace_id = $2
  AND lease_token = $3
`

type DeleteChannelMediaPendingObjectParams struct {
	StorageKey  string      `json:"storage_key"`
	WorkspaceID pgtype.UUID `json:"workspace_id"`
	LeaseToken  pgtype.UUID `json:"lease_token"`
}

// Drops a claimed row for good: a durable attachment reference was found, or
// the tombstone's re-delete schedule is exhausted. Lease-token guarded so an
// expired-lease reclaim by another
// replica cannot be clobbered; workspace_id explicit per the tenancy rule.
func (q *Queries) DeleteChannelMediaPendingObject(ctx context.Context, arg DeleteChannelMediaPendingObjectParams) (int64, error) {
	result, err := q.db.Exec(ctx, deleteChannelMediaPendingObject, arg.StorageKey, arg.WorkspaceID, arg.LeaseToken)
	if err != nil {
		return 0, err
	}
	return result.RowsAffected(), nil
}

const deleteChannelOutboundCardMessagesBySession = `-- name: DeleteChannelOutboundCardMessagesBySession :exec
DELETE FROM channel_outbound_card_message
WHERE chat_session_id = $1
`

// Application-layer integrity (channel_* has no FK/cascade, MUL-3515 §4): drop the
// outbound card-message rows for a chat_session being deleted. They are keyed by
// chat_session_id with no FK and no reaper, so the standalone chat-session delete
// path must prune them here alongside DeleteChannelChatSessionBindingBySession —
// otherwise deleting a chat session leaves them as permanent orphans (Elon's
// follow-up on #4810; the workspace/agent/reclaim sweeps already cover their
// paths). A card that survived its session could only mis-route a later patch.
func (q *Queries) DeleteChannelOutboundCardMessagesBySession(ctx context.Context, chatSessionID pgtype.UUID) error {
	_, err := q.db.Exec(ctx, deleteChannelOutboundCardMessagesBySession, chatSessionID)
	return err
}

const deleteChannelUserBindingsByInstallation = `-- name: DeleteChannelUserBindingsByInstallation :exec
DELETE FROM channel_user_binding
WHERE installation_id = $1
`

// Application-layer integrity (schema has no FK/cascade, MUL-3515 §4): drop
// every member account link for an installation that is being hard-deleted.
// Rebinding a Feishu bot to a DIFFERENT agent starts a fresh installation, so
// old links do not follow — a different agent is a distinct connection and
// members re-establish their link on first contact. The rows could never be
// reused anyway (every Feishu identity lookup is installation_id-scoped, and
// FindReusableChannelUserBinding is Slack-only), so removing them just keeps
// dead rows from accumulating.
func (q *Queries) DeleteChannelUserBindingsByInstallation(ctx context.Context, installationID pgtype.UUID) error {
	_, err := q.db.Exec(ctx, deleteChannelUserBindingsByInstallation, installationID)
	return err
}

const deleteChannelUserBindingsByWorkspaceMember = `-- name: DeleteChannelUserBindingsByWorkspaceMember :exec
DELETE FROM channel_user_binding
WHERE workspace_id = $1 AND multica_user_id = $2
`

type DeleteChannelUserBindingsByWorkspaceMemberParams struct {
	WorkspaceID   pgtype.UUID `json:"workspace_id"`
	MulticaUserID pgtype.UUID `json:"multica_user_id"`
}

// Application-layer integrity (replaces the old member-FK ON DELETE
// CASCADE): prune every binding for a user who has been removed from a
// workspace, across all installations in that workspace.
func (q *Queries) DeleteChannelUserBindingsByWorkspaceMember(ctx context.Context, arg DeleteChannelUserBindingsByWorkspaceMemberParams) error {
	_, err := q.db.Exec(ctx, deleteChannelUserBindingsByWorkspaceMember, arg.WorkspaceID, arg.MulticaUserID)
	return err
}

const findReusableChannelUserBinding = `-- name: FindReusableChannelUserBinding :one
SELECT b.id, b.workspace_id, b.multica_user_id, b.installation_id, b.channel_type, b.channel_user_id, b.config, b.bound_at FROM channel_user_binding b
JOIN channel_installation ci ON ci.id = b.installation_id
WHERE b.workspace_id = $1
  AND b.channel_type = $2
  AND b.channel_user_id = $3
  AND ci.config ->> 'team_id' = $4::text
ORDER BY b.bound_at DESC
LIMIT 1
`

type FindReusableChannelUserBindingParams struct {
	WorkspaceID   pgtype.UUID `json:"workspace_id"`
	ChannelType   string      `json:"channel_type"`
	ChannelUserID string      `json:"channel_user_id"`
	TeamID        string      `json:"team_id"`
}

// Cross-installation account-link reuse (MUL-3911). When a platform user
// messages an installation they have NOT linked, but the SAME user id is already
// bound to ANOTHER installation in the SAME Multica workspace + SAME Slack team,
// the inbound identity step reuses that link instead of re-prompting. Slack user
// ids are stable within a team, so an identical channel_user_id denotes the same
// human across that team's apps. The match is fenced to one workspace AND one
// team (installation config->>'team_id'): a Slack team can be connected to two
// different Multica workspaces, and a user may hold different Multica accounts in
// each, so reuse must cross neither boundary. Most-recently-bound wins. The
// caller re-checks membership and materializes a fresh per-installation binding.
//
// team_id is pinned ::text so sqlc types the arg as a string instead of
// attributing the bare param to the JSONB config column (mirrors
// GetChannelInstallationByAppID's app_id cast).
func (q *Queries) FindReusableChannelUserBinding(ctx context.Context, arg FindReusableChannelUserBindingParams) (ChannelUserBinding, error) {
	row := q.db.QueryRow(ctx, findReusableChannelUserBinding,
		arg.WorkspaceID,
		arg.ChannelType,
		arg.ChannelUserID,
		arg.TeamID,
	)
	var i ChannelUserBinding
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.MulticaUserID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelUserID,
		&i.Config,
		&i.BoundAt,
	)
	return i, err
}

const getChannelChatSessionBinding = `-- name: GetChannelChatSessionBinding :one
SELECT id, chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, last_message_id, last_thread_id, config, created_at FROM channel_chat_session_binding
WHERE installation_id = $1 AND channel_chat_id = $2
`

type GetChannelChatSessionBindingParams struct {
	InstallationID pgtype.UUID `json:"installation_id"`
	ChannelChatID  string      `json:"channel_chat_id"`
}

// Lookup-by-channel-chat: the inbound dispatcher finds the existing
// chat_session before deciding whether to create one.
func (q *Queries) GetChannelChatSessionBinding(ctx context.Context, arg GetChannelChatSessionBindingParams) (ChannelChatSessionBinding, error) {
	row := q.db.QueryRow(ctx, getChannelChatSessionBinding, arg.InstallationID, arg.ChannelChatID)
	var i ChannelChatSessionBinding
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChatType,
		&i.LastMessageID,
		&i.LastThreadID,
		&i.Config,
		&i.CreatedAt,
	)
	return i, err
}

const getChannelChatSessionBindingBySession = `-- name: GetChannelChatSessionBindingBySession :one
SELECT id, chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, last_message_id, last_thread_id, config, created_at FROM channel_chat_session_binding
WHERE chat_session_id = $1
  AND channel_type = $2
`

type GetChannelChatSessionBindingBySessionParams struct {
	ChatSessionID pgtype.UUID `json:"chat_session_id"`
	ChannelType   string      `json:"channel_type"`
}

// Reverse lookup for the outbound patcher: given a chat_session_id, find
// its channel binding to know which (installation, chat_id) to send to.
// Scoped by channel_type so a future non-Feishu binding on the same
// chat_session is never treated as a Feishu reply target.
func (q *Queries) GetChannelChatSessionBindingBySession(ctx context.Context, arg GetChannelChatSessionBindingBySessionParams) (ChannelChatSessionBinding, error) {
	row := q.db.QueryRow(ctx, getChannelChatSessionBindingBySession, arg.ChatSessionID, arg.ChannelType)
	var i ChannelChatSessionBinding
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChatType,
		&i.LastMessageID,
		&i.LastThreadID,
		&i.Config,
		&i.CreatedAt,
	)
	return i, err
}

const getChannelInstallation = `-- name: GetChannelInstallation :one
SELECT id, workspace_id, agent_id, channel_type, config, status, ws_lease_token, ws_lease_expires_at, installer_user_id, installed_at, created_at, updated_at FROM channel_installation
WHERE id = $1 AND channel_type = $2
`

type GetChannelInstallationParams struct {
	ID          pgtype.UUID `json:"id"`
	ChannelType string      `json:"channel_type"`
}

// Scoped by channel_type: a per-channel caller (e.g. the Feishu store)
// must never resolve another channel's installation by guessing its UUID.
func (q *Queries) GetChannelInstallation(ctx context.Context, arg GetChannelInstallationParams) (ChannelInstallation, error) {
	row := q.db.QueryRow(ctx, getChannelInstallation, arg.ID, arg.ChannelType)
	var i ChannelInstallation
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.AgentID,
		&i.ChannelType,
		&i.Config,
		&i.Status,
		&i.WsLeaseToken,
		&i.WsLeaseExpiresAt,
		&i.InstallerUserID,
		&i.InstalledAt,
		&i.CreatedAt,
		&i.UpdatedAt,
	)
	return i, err
}

const getChannelInstallationByAppID = `-- name: GetChannelInstallationByAppID :one
SELECT id, workspace_id, agent_id, channel_type, config, status, ws_lease_token, ws_lease_expires_at, installer_user_id, installed_at, created_at, updated_at FROM channel_installation
WHERE channel_type = $1
  AND config ->> 'app_id' = $2::text
`

type GetChannelInstallationByAppIDParams struct {
	ChannelType string `json:"channel_type"`
	AppID       string `json:"app_id"`
}

// Inbound routing. The platform event carries only the channel's app
// identifier (Feishu app_id); the dispatcher's installation resolver routes
// on (channel_type, config->>'app_id'). Backed by the functional unique
// index idx_channel_installation_type_appid.
//
// Both params are named + explicitly typed: `config ->> 'app_id'` makes sqlc
// attribute a bare `$2` to the JSONB `config` column (it would emit
// `Config []byte`), so we pin the app_id arg to ::text to get AppID string.
func (q *Queries) GetChannelInstallationByAppID(ctx context.Context, arg GetChannelInstallationByAppIDParams) (ChannelInstallation, error) {
	row := q.db.QueryRow(ctx, getChannelInstallationByAppID, arg.ChannelType, arg.AppID)
	var i ChannelInstallation
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.AgentID,
		&i.ChannelType,
		&i.Config,
		&i.Status,
		&i.WsLeaseToken,
		&i.WsLeaseExpiresAt,
		&i.InstallerUserID,
		&i.InstalledAt,
		&i.CreatedAt,
		&i.UpdatedAt,
	)
	return i, err
}

const getChannelInstallationInWorkspace = `-- name: GetChannelInstallationInWorkspace :one
SELECT id, workspace_id, agent_id, channel_type, config, status, ws_lease_token, ws_lease_expires_at, installer_user_id, installed_at, created_at, updated_at FROM channel_installation
WHERE id = $1
  AND workspace_id = $2
  AND channel_type = $3
`

type GetChannelInstallationInWorkspaceParams struct {
	ID          pgtype.UUID `json:"id"`
	WorkspaceID pgtype.UUID `json:"workspace_id"`
	ChannelType string      `json:"channel_type"`
}

func (q *Queries) GetChannelInstallationInWorkspace(ctx context.Context, arg GetChannelInstallationInWorkspaceParams) (ChannelInstallation, error) {
	row := q.db.QueryRow(ctx, getChannelInstallationInWorkspace, arg.ID, arg.WorkspaceID, arg.ChannelType)
	var i ChannelInstallation
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.AgentID,
		&i.ChannelType,
		&i.Config,
		&i.Status,
		&i.WsLeaseToken,
		&i.WsLeaseExpiresAt,
		&i.InstallerUserID,
		&i.InstalledAt,
		&i.CreatedAt,
		&i.UpdatedAt,
	)
	return i, err
}

const getChannelInstallationOwnerByAppID = `-- name: GetChannelInstallationOwnerByAppID :one
SELECT ci.workspace_id, ci.agent_id, a.archived_at AS agent_archived_at
FROM channel_installation ci
JOIN agent a ON a.id = ci.agent_id
WHERE ci.channel_type = $1
  AND ci.config ->> 'app_id' = $2::text
`

type GetChannelInstallationOwnerByAppIDParams struct {
	ChannelType string `json:"channel_type"`
	AppID       string `json:"app_id"`
}

type GetChannelInstallationOwnerByAppIDRow struct {
	WorkspaceID     pgtype.UUID        `json:"workspace_id"`
	AgentID         pgtype.UUID        `json:"agent_id"`
	AgentArchivedAt pgtype.Timestamptz `json:"agent_archived_at"`
}

// Identifies the LIVE owner of a (channel_type, config->>'app_id') routing slot
// so the install path can refuse a rebind with an ACCURATE message instead of the
// old catch-all "connected to a different Multica workspace". Meant to be read
// only after ReclaimDeadChannelInstallationByAppID has removed every DEAD owner,
// so a returned row is a live active owner. `agent_archived` distinguishes an
// archived (reversible) owner — its bot stays owned, recovered by unarchiving the
// agent or disconnecting the bot — from a plain active one. The JOIN drops a row
// whose agent no longer exists (an orphan the reclaim gate should already have
// cleared), so a missing row (pgx.ErrNoRows) means "no live owner". The caller
// reads agent_archived_at.Valid to tell an archived (reversible) owner apart.
func (q *Queries) GetChannelInstallationOwnerByAppID(ctx context.Context, arg GetChannelInstallationOwnerByAppIDParams) (GetChannelInstallationOwnerByAppIDRow, error) {
	row := q.db.QueryRow(ctx, getChannelInstallationOwnerByAppID, arg.ChannelType, arg.AppID)
	var i GetChannelInstallationOwnerByAppIDRow
	err := row.Scan(&i.WorkspaceID, &i.AgentID, &i.AgentArchivedAt)
	return i, err
}

const getChannelOutboundCardByTask = `-- name: GetChannelOutboundCardByTask :one
SELECT id, chat_session_id, task_id, channel_type, channel_chat_id, channel_card_message_id, status, last_patched_at, created_at FROM channel_outbound_card_message
WHERE task_id = $1
  AND channel_type = $2
`

type GetChannelOutboundCardByTaskParams struct {
	TaskID      pgtype.UUID `json:"task_id"`
	ChannelType string      `json:"channel_type"`
}

// The partial unique index on (task_id) WHERE task_id IS NOT NULL
// guarantees at most one row. Scoped by channel_type so a future non-Feishu
// card for the same task is not patched as a Feishu card.
func (q *Queries) GetChannelOutboundCardByTask(ctx context.Context, arg GetChannelOutboundCardByTaskParams) (ChannelOutboundCardMessage, error) {
	row := q.db.QueryRow(ctx, getChannelOutboundCardByTask, arg.TaskID, arg.ChannelType)
	var i ChannelOutboundCardMessage
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.TaskID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChannelCardMessageID,
		&i.Status,
		&i.LastPatchedAt,
		&i.CreatedAt,
	)
	return i, err
}

const getChannelUserBindingByUserID = `-- name: GetChannelUserBindingByUserID :one
SELECT id, workspace_id, multica_user_id, installation_id, channel_type, channel_user_id, config, bound_at FROM channel_user_binding
WHERE installation_id = $1 AND channel_user_id = $2
`

type GetChannelUserBindingByUserIDParams struct {
	InstallationID pgtype.UUID `json:"installation_id"`
	ChannelUserID  string      `json:"channel_user_id"`
}

// The inbound identity lookup: does this platform user id map to a Multica
// user for this installation? With the member-FK removed, a row's
// existence no longer proves current workspace membership — the dispatcher
// re-checks membership after this lookup.
func (q *Queries) GetChannelUserBindingByUserID(ctx context.Context, arg GetChannelUserBindingByUserIDParams) (ChannelUserBinding, error) {
	row := q.db.QueryRow(ctx, getChannelUserBindingByUserID, arg.InstallationID, arg.ChannelUserID)
	var i ChannelUserBinding
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.MulticaUserID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelUserID,
		&i.Config,
		&i.BoundAt,
	)
	return i, err
}

const listActiveChannelInstallations = `-- name: ListActiveChannelInstallations :many
SELECT ci.id, ci.workspace_id, ci.agent_id, ci.channel_type, ci.config, ci.status, ci.ws_lease_token, ci.ws_lease_expires_at, ci.installer_user_id, ci.installed_at, ci.created_at, ci.updated_at FROM channel_installation ci
JOIN workspace w ON w.id = ci.workspace_id
JOIN agent a ON a.id = ci.agent_id
WHERE ci.status = 'active'
  AND ci.channel_type = $1
ORDER BY ci.created_at ASC
`

// Boot path for a per-channel-type inbound hub: every active installation of
// the given channel_type, so a hub claims leases and opens connections only
// for its own platform and never supervises another channel's installation.
//
// The JOINs require the owning workspace and agent rows to still exist.
// channel_installation has no FK (MUL-3515 §4), so unlike the old
// lark_installation (which cascaded away on workspace/agent deletion) an
// installation can be orphaned when its workspace is deleted or its agent is
// hard-deleted (e.g. runtime teardown). Without this guard the hub would keep
// opening a WebSocket for a bot whose workspace/agent is gone. The JOIN matches
// the old ON DELETE CASCADE semantics: it filters on row existence, not agent
// archival, so an archived-but-present agent's installation is still listed.
func (q *Queries) ListActiveChannelInstallations(ctx context.Context, channelType string) ([]ChannelInstallation, error) {
	rows, err := q.db.Query(ctx, listActiveChannelInstallations, channelType)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	items := []ChannelInstallation{}
	for rows.Next() {
		var i ChannelInstallation
		if err := rows.Scan(
			&i.ID,
			&i.WorkspaceID,
			&i.AgentID,
			&i.ChannelType,
			&i.Config,
			&i.Status,
			&i.WsLeaseToken,
			&i.WsLeaseExpiresAt,
			&i.InstallerUserID,
			&i.InstalledAt,
			&i.CreatedAt,
			&i.UpdatedAt,
		); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const listAllActiveChannelInstallations = `-- name: ListAllActiveChannelInstallations :many
SELECT ci.id, ci.workspace_id, ci.agent_id, ci.channel_type, ci.config, ci.status, ci.ws_lease_token, ci.ws_lease_expires_at, ci.installer_user_id, ci.installed_at, ci.created_at, ci.updated_at FROM channel_installation ci
JOIN workspace w ON w.id = ci.workspace_id
JOIN agent a ON a.id = ci.agent_id
WHERE ci.status = 'active'
ORDER BY ci.created_at ASC
`

// Boot path for the channel-agnostic engine Supervisor (MUL-3620): every
// active installation across ALL channel types, so one Supervisor drives every
// platform's connections rather than a per-platform hub. This is the de-
// hardcoded counterpart of ListActiveChannelInstallations — the Supervisor
// routes each row to its registered channel.Factory by channel_type, so it
// never needs to know which platforms exist. Same orphan guard as the per-type
// query: the workspace + agent JOINs drop installations whose owning rows are
// gone (channel_installation has no FK, MUL-3515 §4), matching the old ON
// DELETE CASCADE semantics (row existence, not agent archival).
func (q *Queries) ListAllActiveChannelInstallations(ctx context.Context) ([]ChannelInstallation, error) {
	rows, err := q.db.Query(ctx, listAllActiveChannelInstallations)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	items := []ChannelInstallation{}
	for rows.Next() {
		var i ChannelInstallation
		if err := rows.Scan(
			&i.ID,
			&i.WorkspaceID,
			&i.AgentID,
			&i.ChannelType,
			&i.Config,
			&i.Status,
			&i.WsLeaseToken,
			&i.WsLeaseExpiresAt,
			&i.InstallerUserID,
			&i.InstalledAt,
			&i.CreatedAt,
			&i.UpdatedAt,
		); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const listChannelInboundAuditByInstallation = `-- name: ListChannelInboundAuditByInstallation :many
SELECT id, installation_id, channel_type, channel_chat_id, event_type, channel_event_id, channel_message_id, drop_reason, received_at FROM channel_inbound_audit
WHERE installation_id = $1
ORDER BY received_at DESC
LIMIT $2 OFFSET $3
`

type ListChannelInboundAuditByInstallationParams struct {
	InstallationID pgtype.UUID `json:"installation_id"`
	Limit          int32       `json:"limit"`
	Offset         int32       `json:"offset"`
}

func (q *Queries) ListChannelInboundAuditByInstallation(ctx context.Context, arg ListChannelInboundAuditByInstallationParams) ([]ChannelInboundAudit, error) {
	rows, err := q.db.Query(ctx, listChannelInboundAuditByInstallation, arg.InstallationID, arg.Limit, arg.Offset)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	items := []ChannelInboundAudit{}
	for rows.Next() {
		var i ChannelInboundAudit
		if err := rows.Scan(
			&i.ID,
			&i.InstallationID,
			&i.ChannelType,
			&i.ChannelChatID,
			&i.EventType,
			&i.ChannelEventID,
			&i.ChannelMessageID,
			&i.DropReason,
			&i.ReceivedAt,
		); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const listChannelInstallationsByWorkspace = `-- name: ListChannelInstallationsByWorkspace :many
SELECT id, workspace_id, agent_id, channel_type, config, status, ws_lease_token, ws_lease_expires_at, installer_user_id, installed_at, created_at, updated_at FROM channel_installation
WHERE workspace_id = $1
  AND channel_type = $2
ORDER BY created_at ASC
`

type ListChannelInstallationsByWorkspaceParams struct {
	WorkspaceID pgtype.UUID `json:"workspace_id"`
	ChannelType string      `json:"channel_type"`
}

// Scoped by channel_type so a per-channel management surface (e.g. the Lark
// installation list) only ever sees its own platform's installations.
func (q *Queries) ListChannelInstallationsByWorkspace(ctx context.Context, arg ListChannelInstallationsByWorkspaceParams) ([]ChannelInstallation, error) {
	rows, err := q.db.Query(ctx, listChannelInstallationsByWorkspace, arg.WorkspaceID, arg.ChannelType)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	items := []ChannelInstallation{}
	for rows.Next() {
		var i ChannelInstallation
		if err := rows.Scan(
			&i.ID,
			&i.WorkspaceID,
			&i.AgentID,
			&i.ChannelType,
			&i.Config,
			&i.Status,
			&i.WsLeaseToken,
			&i.WsLeaseExpiresAt,
			&i.InstallerUserID,
			&i.InstalledAt,
			&i.CreatedAt,
			&i.UpdatedAt,
		); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const markChannelInboundDedupProcessed = `-- name: MarkChannelInboundDedupProcessed :execrows
UPDATE channel_inbound_message_dedup
SET processed_at = now()
WHERE installation_id = $1
  AND message_id = $2
  AND claim_token = $3
  AND processed_at IS NULL
`

type MarkChannelInboundDedupProcessedParams struct {
	InstallationID pgtype.UUID `json:"installation_id"`
	MessageID      string      `json:"message_id"`
	ClaimToken     pgtype.UUID `json:"claim_token"`
}

// Locks a claim in as permanently processed after a durable outcome.
// Invoked inside the chat_message tx (via qtx) on the ingest path so the
// durable write and the Mark commit atomically. Token mismatch returns
// zero rows (a reclaim happened); the caller rolls back its in-tx write.
func (q *Queries) MarkChannelInboundDedupProcessed(ctx context.Context, arg MarkChannelInboundDedupProcessedParams) (int64, error) {
	result, err := q.db.Exec(ctx, markChannelInboundDedupProcessed, arg.InstallationID, arg.MessageID, arg.ClaimToken)
	if err != nil {
		return 0, err
	}
	return result.RowsAffected(), nil
}

const nullChannelInboundAuditInstallationID = `-- name: NullChannelInboundAuditInstallationID :exec
UPDATE channel_inbound_audit
SET installation_id = NULL
WHERE installation_id = $1
`

// Application-layer stand-in for the old ON DELETE SET NULL (MUL-3515 §4,
// migration 124 keeps installation_id nullable for exactly this): before an
// installation row is hard-deleted, detach its inbound-audit rows by NULLing
// installation_id. The drop-audit history is preserved (channel_type,
// chat/message ids, drop_reason stay) without a dangling reference to a
// removed installation.
func (q *Queries) NullChannelInboundAuditInstallationID(ctx context.Context, installationID pgtype.UUID) error {
	_, err := q.db.Exec(ctx, nullChannelInboundAuditInstallationID, installationID)
	return err
}

const purgeChannelInboundDedup = `-- name: PurgeChannelInboundDedup :exec
DELETE FROM channel_inbound_message_dedup
WHERE received_at < $1
`

// Vacuum job: remove dedup rows older than the supplied cutoff (e.g. 24h).
func (q *Queries) PurgeChannelInboundDedup(ctx context.Context, receivedAt pgtype.Timestamptz) error {
	_, err := q.db.Exec(ctx, purgeChannelInboundDedup, receivedAt)
	return err
}

const purgeExpiredChannelBindingTokens = `-- name: PurgeExpiredChannelBindingTokens :exec
DELETE FROM channel_binding_token
WHERE expires_at < $1
`

func (q *Queries) PurgeExpiredChannelBindingTokens(ctx context.Context, expiresAt pgtype.Timestamptz) error {
	_, err := q.db.Exec(ctx, purgeExpiredChannelBindingTokens, expiresAt)
	return err
}

const reclaimDeadChannelInstallationByAppID = `-- name: ReclaimDeadChannelInstallationByAppID :one
WITH dead AS (
    DELETE FROM channel_installation ci
    WHERE ci.channel_type = $1
      AND ci.config ->> 'app_id' = $2::text
      AND (
            (ci.status = 'revoked'
                AND NOT (ci.workspace_id = $3
                         AND ci.agent_id = $4))
         OR NOT EXISTS (SELECT 1 FROM workspace w WHERE w.id = ci.workspace_id)
         OR NOT EXISTS (SELECT 1 FROM agent a WHERE a.id = ci.agent_id)
      )
    RETURNING ci.id
),
cleared_chat_sessions AS (
    DELETE FROM channel_chat_session_binding
    WHERE installation_id IN (SELECT id FROM dead)
    RETURNING chat_session_id
),
cleared_outbound_cards AS (
    -- channel_outbound_card_message is keyed by chat_session_id (no installation_id,
    -- no FK), so it is reached through the just-removed chat-session bindings. On an
    -- orphan reclaim the chat_session row itself is already cascade-gone, but its
    -- binding survived and still carries the id — the only reliable link back.
    DELETE FROM channel_outbound_card_message
    WHERE chat_session_id IN (SELECT chat_session_id FROM cleared_chat_sessions)
),
cleared_binding_tokens AS (
    DELETE FROM channel_binding_token
    WHERE installation_id IN (SELECT id FROM dead)
),
cleared_user_bindings AS (
    DELETE FROM channel_user_binding
    WHERE installation_id IN (SELECT id FROM dead)
),
cleared_inbound_dedup AS (
    DELETE FROM channel_inbound_message_dedup
    WHERE installation_id IN (SELECT id FROM dead)
),
detached_audit AS (
    -- Reclaim keeps the DETACH semantics: the workspace still exists, so a
    -- NULL-installation audit row stays meaningful for operator triage. The hard-
    -- delete paths (DeleteWorkspace / runtime teardown) purge audit outright.
    UPDATE channel_inbound_audit SET installation_id = NULL
    WHERE installation_id IN (SELECT id FROM dead)
)
SELECT id FROM dead
`

type ReclaimDeadChannelInstallationByAppIDParams struct {
	ChannelType string      `json:"channel_type"`
	AppID       string      `json:"app_id"`
	WorkspaceID pgtype.UUID `json:"workspace_id"`
	AgentID     pgtype.UUID `json:"agent_id"`
}

// Rebind cleanup gate. Frees the (channel_type, config->>'app_id') routing slot
// so a valid new agent can (re)bind a bot whose previous owner is DEAD, and, in
// the same statement, clears every application-owned dependent row of the removed
// installation (channel_* has no FK/cascade, MUL-3515 §4). Returns the removed id
// (pgx.ErrNoRows when nothing was dead — a no-op the caller treats as success).
//
// "Dead" is exactly one of:
//  1. a REVOKED placeholder held by ANY agent OTHER than the caller's own
//     (workspace, agent) pair. Disconnect only flips status to 'revoked' — no
//     product path ever hard-deletes the row — so a revoked row would otherwise
//     pin the bot's app_id slot forever with no self-serve recovery, even across
//     workspaces (workspace A disconnects; workspace B, which proves control by
//     holding the same app credentials, rebinds). Revoke is the owner's explicit
//     "I'm done with this bot", so any revoked row is reclaimable — only the
//     caller's OWN revoked row is spared (reactivated in place; see below).
//  2. an ORPHAN whose owning workspace OR agent row no longer exists — the
//     workspace was deleted, or the agent was hard-deleted on runtime teardown.
//     With no FK the installation outlives its owner and keeps occupying the
//     app_id slot: the "ghost binding" that made a bot un-rebindable (#4810).
//
// Deliberately NOT dead (the caller refuses these with an accurate conflict):
//   - the SAME agent's own revoked row (agent_id = @agent_id): the upsert
//     reactivates it in place, preserving its installation_id and every binding;
//   - a live ACTIVE owner whose agent still exists — INCLUDING an ARCHIVED agent:
//     archive is reversible, so its bot stays owned rather than being silently
//     stolen. Only a hard delete frees the slot.
//
// The guard lives in the DELETE predicate (not a prior SELECT) so under READ
// COMMITTED the row is re-checked at execution (EvalPlanQual): a concurrent
// same-agent reconnect that flips the revoked row back to 'active' first makes
// the predicate re-check fail, this deletes nothing, and no dependents are
// touched — closing the read-then-delete TOCTOU. Dependent cleanup keys off the
// actually-deleted id (the `dead` CTE), so it runs ONLY for a row this statement
// removed. The (channel_type, app_id) unique index guarantees at most one match.
func (q *Queries) ReclaimDeadChannelInstallationByAppID(ctx context.Context, arg ReclaimDeadChannelInstallationByAppIDParams) (pgtype.UUID, error) {
	row := q.db.QueryRow(ctx, reclaimDeadChannelInstallationByAppID,
		arg.ChannelType,
		arg.AppID,
		arg.WorkspaceID,
		arg.AgentID,
	)
	var id pgtype.UUID
	err := row.Scan(&id)
	return id, err
}

const recordChannelInboundDrop = `-- name: RecordChannelInboundDrop :exec

INSERT INTO channel_inbound_audit (
    installation_id, channel_type, channel_chat_id, event_type,
    channel_event_id, channel_message_id, drop_reason
) VALUES (
    $4,
    $1,
    $5,
    $2,
    $6,
    $7,
    $3
)
`

type RecordChannelInboundDropParams struct {
	ChannelType      string      `json:"channel_type"`
	EventType        string      `json:"event_type"`
	DropReason       string      `json:"drop_reason"`
	InstallationID   pgtype.UUID `json:"installation_id"`
	ChannelChatID    pgtype.Text `json:"channel_chat_id"`
	ChannelEventID   pgtype.Text `json:"channel_event_id"`
	ChannelMessageID pgtype.Text `json:"channel_message_id"`
}

// =====================
// channel_inbound_audit
// =====================
// The only write path for dropped events. Deliberately carries no body
// column — only routing / identity / drop_reason / timestamp.
func (q *Queries) RecordChannelInboundDrop(ctx context.Context, arg RecordChannelInboundDropParams) error {
	_, err := q.db.Exec(ctx, recordChannelInboundDrop,
		arg.ChannelType,
		arg.EventType,
		arg.DropReason,
		arg.InstallationID,
		arg.ChannelChatID,
		arg.ChannelEventID,
		arg.ChannelMessageID,
	)
	return err
}

const recordChannelMediaPendingObject = `-- name: RecordChannelMediaPendingObject :one

INSERT INTO channel_media_pending_object (
    storage_key, workspace_id, chat_message_id, storage_url, installation_id
)
VALUES ($1, $2, $3, $4, $5)
ON CONFLICT (storage_key) DO UPDATE
SET created_at = now(), next_attempt_at = now(),
    chat_message_id = EXCLUDED.chat_message_id,
    storage_url = EXCLUDED.storage_url
WHERE channel_media_pending_object.state = 'pending'
  AND channel_media_pending_object.workspace_id = EXCLUDED.workspace_id
RETURNING storage_key
`

type RecordChannelMediaPendingObjectParams struct {
	StorageKey     string      `json:"storage_key"`
	WorkspaceID    pgtype.UUID `json:"workspace_id"`
	ChatMessageID  pgtype.UUID `json:"chat_message_id"`
	StorageUrl     string      `json:"storage_url"`
	InstallationID pgtype.UUID `json:"installation_id"`
}

// =====================
// channel_media_pending_object (media intent ledger)
// =====================
// Records upload intent BEFORE the PUT. A redelivered attempt refreshes the
// settle window, but only while the row is still 'pending' — a key the
// reconciler owns ('deleting') must never be resurrected — and only within
// the SAME workspace: a cross-workspace key collision (impossible via the
// derived key, but tenancy must never trust the key string) updates nothing
// and returns no row, so the caller skips the upload entirely.
func (q *Queries) RecordChannelMediaPendingObject(ctx context.Context, arg RecordChannelMediaPendingObjectParams) (string, error) {
	row := q.db.QueryRow(ctx, recordChannelMediaPendingObject,
		arg.StorageKey,
		arg.WorkspaceID,
		arg.ChatMessageID,
		arg.StorageUrl,
		arg.InstallationID,
	)
	var storage_key string
	err := row.Scan(&storage_key)
	return storage_key, err
}

const releaseChannelInboundDedup = `-- name: ReleaseChannelInboundDedup :execrows
DELETE FROM channel_inbound_message_dedup
WHERE installation_id = $1
  AND message_id = $2
  AND claim_token = $3
  AND processed_at IS NULL
`

type ReleaseChannelInboundDedupParams struct {
	InstallationID pgtype.UUID `json:"installation_id"`
	MessageID      string      `json:"message_id"`
	ClaimToken     pgtype.UUID `json:"claim_token"`
}

// Releases an in-flight claim when an infra error occurred before any
// durable side effect, so a retry can re-acquire immediately. Fenced on
// processed_at IS NULL and claim_token.
func (q *Queries) ReleaseChannelInboundDedup(ctx context.Context, arg ReleaseChannelInboundDedupParams) (int64, error) {
	result, err := q.db.Exec(ctx, releaseChannelInboundDedup, arg.InstallationID, arg.MessageID, arg.ClaimToken)
	if err != nil {
		return 0, err
	}
	return result.RowsAffected(), nil
}

const releaseChannelMediaPendingObject = `-- name: ReleaseChannelMediaPendingObject :exec
UPDATE channel_media_pending_object
SET lease_token = NULL,
    lease_expires_at = NULL,
    next_attempt_at = now() + $1::interval,
    last_error = $2
WHERE storage_key = $3
  AND workspace_id = $4
  AND lease_token = $5
`

type ReleaseChannelMediaPendingObjectParams struct {
	Backoff     pgtype.Interval `json:"backoff"`
	LastError   pgtype.Text     `json:"last_error"`
	StorageKey  string          `json:"storage_key"`
	WorkspaceID pgtype.UUID     `json:"workspace_id"`
	LeaseToken  pgtype.UUID     `json:"lease_token"`
}

// Object-storage DELETE failed: keep the row in 'deleting' (bind must still
// never attach it), release the lease, and back off the next attempt.
// workspace_id is redundant with the storage_key PK but explicit per the
// tenancy rule: every query constrains the workspace column, never trusting
// the key string.
func (q *Queries) ReleaseChannelMediaPendingObject(ctx context.Context, arg ReleaseChannelMediaPendingObjectParams) error {
	_, err := q.db.Exec(ctx, releaseChannelMediaPendingObject,
		arg.Backoff,
		arg.LastError,
		arg.StorageKey,
		arg.WorkspaceID,
		arg.LeaseToken,
	)
	return err
}

const releaseChannelWSLease = `-- name: ReleaseChannelWSLease :exec
UPDATE channel_installation
SET ws_lease_token      = NULL,
    ws_lease_expires_at = NULL,
    updated_at          = now()
WHERE id = $1
  AND ws_lease_token = $2
`

type ReleaseChannelWSLeaseParams struct {
	ID           pgtype.UUID `json:"id"`
	CurrentToken pgtype.Text `json:"current_token"`
}

// Drops the lease iff we are still the holder.
func (q *Queries) ReleaseChannelWSLease(ctx context.Context, arg ReleaseChannelWSLeaseParams) error {
	_, err := q.db.Exec(ctx, releaseChannelWSLease, arg.ID, arg.CurrentToken)
	return err
}

const setChannelInstallationConfig = `-- name: SetChannelInstallationConfig :exec
UPDATE channel_installation
SET config = $2, updated_at = now()
WHERE id = $1
`

type SetChannelInstallationConfigParams struct {
	ID     pgtype.UUID `json:"id"`
	Config []byte      `json:"config"`
}

// Replaces the whole config blob for one installation. Used by the
// operator backfills (e.g. setting a freshly-fetched bot_union_id) that
// read-modify-write the JSON in Go and persist it back atomically by id.
func (q *Queries) SetChannelInstallationConfig(ctx context.Context, arg SetChannelInstallationConfigParams) error {
	_, err := q.db.Exec(ctx, setChannelInstallationConfig, arg.ID, arg.Config)
	return err
}

const setChannelInstallationStatus = `-- name: SetChannelInstallationStatus :exec
UPDATE channel_installation
SET status = $2, updated_at = now()
WHERE id = $1
`

type SetChannelInstallationStatusParams struct {
	ID     pgtype.UUID `json:"id"`
	Status string      `json:"status"`
}

func (q *Queries) SetChannelInstallationStatus(ctx context.Context, arg SetChannelInstallationStatusParams) error {
	_, err := q.db.Exec(ctx, setChannelInstallationStatus, arg.ID, arg.Status)
	return err
}

const tombstoneChannelMediaPendingObject = `-- name: TombstoneChannelMediaPendingObject :execrows
UPDATE channel_media_pending_object
SET state = 'tombstoned',
    lease_token = NULL,
    lease_expires_at = NULL,
    next_attempt_at = now() + $1::interval,
    -- The pass index lives in its own column: a failed re-delete writes
    -- last_error, so carrying the schedule position there would reset the
    -- walk on every failure and a flaky store could keep the row alive
    -- indefinitely. The delete that got here succeeded, so any previous
    -- failure text is stale.
    tombstone_pass = $2,
    last_error = NULL
WHERE storage_key = $3
  AND workspace_id = $4
  AND lease_token = $5
`

type TombstoneChannelMediaPendingObjectParams struct {
	RedeleteDelay pgtype.Interval `json:"redelete_delay"`
	TombstonePass int32           `json:"tombstone_pass"`
	StorageKey    string          `json:"storage_key"`
	WorkspaceID   pgtype.UUID     `json:"workspace_id"`
	LeaseToken    pgtype.UUID     `json:"lease_token"`
}

// The object was deleted, but the row is KEPT as a tombstone: a PUT the client
// abandoned before the delete may still materialize the object afterwards, and
// no DELETE can be ordered against it. Each due tombstone re-runs the
// reference check and, only if still unreferenced, triggers another idempotent
// delete, so a late materialization is reclaimed by a later pass while an
// object something durably reads is never removed;
// only after the re-delete schedule is exhausted is the row dropped
// (DeleteChannelMediaPendingObject). Lease-token guarded like every other
// settle write; workspace_id explicit per the tenancy rule.
func (q *Queries) TombstoneChannelMediaPendingObject(ctx context.Context, arg TombstoneChannelMediaPendingObjectParams) (int64, error) {
	result, err := q.db.Exec(ctx, tombstoneChannelMediaPendingObject,
		arg.RedeleteDelay,
		arg.TombstonePass,
		arg.StorageKey,
		arg.WorkspaceID,
		arg.LeaseToken,
	)
	if err != nil {
		return 0, err
	}
	return result.RowsAffected(), nil
}

const updateChannelChatSessionBindingReplyTarget = `-- name: UpdateChannelChatSessionBindingReplyTarget :exec
UPDATE channel_chat_session_binding
SET last_message_id = $2,
    last_thread_id  = $3
WHERE chat_session_id = $1
`

type UpdateChannelChatSessionBindingReplyTargetParams struct {
	ChatSessionID pgtype.UUID `json:"chat_session_id"`
	LastMessageID pgtype.Text `json:"last_message_id"`
	LastThreadID  pgtype.Text `json:"last_thread_id"`
}

// Records the most recent inbound trigger message + thread so the decoupled
// outbound patcher can thread its reply back into the originating topic.
func (q *Queries) UpdateChannelChatSessionBindingReplyTarget(ctx context.Context, arg UpdateChannelChatSessionBindingReplyTargetParams) error {
	_, err := q.db.Exec(ctx, updateChannelChatSessionBindingReplyTarget, arg.ChatSessionID, arg.LastMessageID, arg.LastThreadID)
	return err
}

const updateChannelOutboundCardStatus = `-- name: UpdateChannelOutboundCardStatus :exec
UPDATE channel_outbound_card_message
SET status = $2,
    last_patched_at = now()
WHERE id = $1
`

type UpdateChannelOutboundCardStatusParams struct {
	ID     pgtype.UUID `json:"id"`
	Status string      `json:"status"`
}

func (q *Queries) UpdateChannelOutboundCardStatus(ctx context.Context, arg UpdateChannelOutboundCardStatusParams) error {
	_, err := q.db.Exec(ctx, updateChannelOutboundCardStatus, arg.ID, arg.Status)
	return err
}

const upsertChannelInstallation = `-- name: UpsertChannelInstallation :one


INSERT INTO channel_installation (
    workspace_id, agent_id, channel_type, config, installer_user_id
) VALUES (
    $1, $2, $3, $4, $5
)
ON CONFLICT (workspace_id, agent_id, channel_type) DO UPDATE SET
    channel_type      = EXCLUDED.channel_type,
    config            = EXCLUDED.config,
    installer_user_id = EXCLUDED.installer_user_id,
    status            = 'active',
    installed_at      = now(),
    updated_at        = now()
RETURNING id, workspace_id, agent_id, channel_type, config, status, ws_lease_token, ws_lease_expires_at, installer_user_id, installed_at, created_at, updated_at
`

type UpsertChannelInstallationParams struct {
	WorkspaceID     pgtype.UUID `json:"workspace_id"`
	AgentID         pgtype.UUID `json:"agent_id"`
	ChannelType     string      `json:"channel_type"`
	Config          []byte      `json:"config"`
	InstallerUserID pgtype.UUID `json:"installer_user_id"`
}

// Platform-agnostic inbound channel queries (MUL-3515). These operate on
// the channel_* tables created in migration 124. Each installation carries
// a `channel_type` discriminator and a JSONB `config` blob for
// platform-specific identifiers/credentials; the cross-platform columns
// stay flat. The Go layer owns building/parsing config — these queries
// treat it as opaque JSON except for the routing index on config->>'app_id'.
//
// No foreign keys exist on these tables (MUL-3515 §4): the integrity the
// old composite FKs enforced (binding workspace matches installation;
// binding dies with membership / chat_session) is maintained in the
// application layer via the membership check in the inbound identity step
// and the *DeleteChannel*BindingsBy* cleanup queries below.
// =====================
// channel_installation
// =====================
// Install / re-install path. `config` is the opaque per-channel JSONB the
// Go layer assembles (for feishu: app_id, app_secret_encrypted, tenant_key,
// bot_open_id, bot_union_id, region). Re-installing the same agent on the
// same channel_type replaces the whole config and forces status back to
// 'active'. The conflict key is (workspace_id, agent_id, channel_type) so an
// agent may hold one installation per channel_type (feishu + slack + ...)
// without one install clobbering another. The WS lease is intentionally NOT
// reset here — the inbound hub owns lease lifecycle.
func (q *Queries) UpsertChannelInstallation(ctx context.Context, arg UpsertChannelInstallationParams) (ChannelInstallation, error) {
	row := q.db.QueryRow(ctx, upsertChannelInstallation,
		arg.WorkspaceID,
		arg.AgentID,
		arg.ChannelType,
		arg.Config,
		arg.InstallerUserID,
	)
	var i ChannelInstallation
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.AgentID,
		&i.ChannelType,
		&i.Config,
		&i.Status,
		&i.WsLeaseToken,
		&i.WsLeaseExpiresAt,
		&i.InstallerUserID,
		&i.InstalledAt,
		&i.CreatedAt,
		&i.UpdatedAt,
	)
	return i, err
}

const upsertChannelInstallationByAppID = `-- name: UpsertChannelInstallationByAppID :one
INSERT INTO channel_installation (
    workspace_id, agent_id, channel_type, config, installer_user_id
) VALUES (
    $1, $2, $3, $4, $5
)
ON CONFLICT (channel_type, (config ->> 'app_id')) DO UPDATE SET
    agent_id          = EXCLUDED.agent_id,
    config            = EXCLUDED.config,
    installer_user_id = EXCLUDED.installer_user_id,
    status            = 'active',
    installed_at      = now(),
    updated_at        = now()
WHERE channel_installation.workspace_id = EXCLUDED.workspace_id
RETURNING id, workspace_id, agent_id, channel_type, config, status, ws_lease_token, ws_lease_expires_at, installer_user_id, installed_at, created_at, updated_at
`

type UpsertChannelInstallationByAppIDParams struct {
	WorkspaceID     pgtype.UUID `json:"workspace_id"`
	AgentID         pgtype.UUID `json:"agent_id"`
	ChannelType     string      `json:"channel_type"`
	Config          []byte      `json:"config"`
	InstallerUserID pgtype.UUID `json:"installer_user_id"`
}

// Team-keyed install / re-install for channels whose natural identity is the
// platform workspace, not the (agent) pairing. Slack: one Slack workspace
// (team_id, stored as config->>'app_id') maps to exactly one installation, so
// re-connecting it — even to represent a DIFFERENT agent in the SAME Multica
// workspace — UPDATES the existing row (moving agent_id) instead of colliding
// with the (channel_type, app_id) unique index. Contrast UpsertChannelInstallation,
// whose conflict key is (workspace_id, agent_id, channel_type): right for Feishu
// (one app per agent), wrong for Slack.
//
// The `WHERE channel_installation.workspace_id = EXCLUDED.workspace_id` fences
// the conflict update to the SAME Multica workspace: a team already owned by a
// DIFFERENT workspace updates no row and RETURNING is empty (pgx.ErrNoRows),
// which the caller maps to ErrTeamOwnedByAnotherWorkspace. This is the ATOMIC
// cross-workspace guard — a plain SELECT before the upsert cannot stop two
// workspaces racing to OAuth the same team (both read no rows, then one inserts
// and the other's conflict-update would silently steal it). A re-connect that
// would move the team to an agent already holding a different Slack install in
// the same workspace still trips the (workspace_id, agent_id, channel_type)
// unique constraint — a genuine conflict the OAuth callback turns into a redirect.
func (q *Queries) UpsertChannelInstallationByAppID(ctx context.Context, arg UpsertChannelInstallationByAppIDParams) (ChannelInstallation, error) {
	row := q.db.QueryRow(ctx, upsertChannelInstallationByAppID,
		arg.WorkspaceID,
		arg.AgentID,
		arg.ChannelType,
		arg.Config,
		arg.InstallerUserID,
	)
	var i ChannelInstallation
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.AgentID,
		&i.ChannelType,
		&i.Config,
		&i.Status,
		&i.WsLeaseToken,
		&i.WsLeaseExpiresAt,
		&i.InstallerUserID,
		&i.InstalledAt,
		&i.CreatedAt,
		&i.UpdatedAt,
	)
	return i, err
}