yushen ff206baa6f feat(daemon): add periodic GC for workspace isolation directories ...

Isolation directories accumulate indefinitely because they're preserved
for session reuse but never cleaned up after the issue is closed.

This adds a background GC loop that periodically scans local workspace
directories and removes those whose issue is done/canceled and hasn't
been updated for 5 days (configurable via MULTICA_GC_TTL). Orphan
directories with no metadata are cleaned after 30 days.

Changes:
- Write .gc_meta.json (issue_id, workspace_id) at task completion
- Add GET /api/daemon/issues/{issueId}/gc-check endpoint for status queries
- Add gcLoop goroutine to daemon with configurable interval/TTL
- Prune stale git worktree references from bare repo caches each cycle
- New env vars: MULTICA_GC_ENABLED, MULTICA_GC_INTERVAL, MULTICA_GC_TTL,
  MULTICA_GC_ORPHAN_TTL

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-04-13 14:46:48 +08:00

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