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The reconciler claimed a batch of ledger rows under one lease and settled them serially, so a tail row could expire and be reclaimed before its own DELETE was ever tried — inflating attempt/backoff for work that never happened, and delaying the row's first real attempt. Rows are now claimed one at a time, immediately before the work each claim authorizes, so attempt counts attempts. The per-row lease heartbeat is gone: the lease only has to cover one row's settle (30s delete timeout << 2m lease) and every settle write is already lease-token guarded. Migration 232 adds an index on next_attempt_at: migration 230's index leads with state and cannot serve the claim's cross-state ordering, so under backlog every claim in a sweep paid a full seq scan plus an external merge sort. Shutdown that lands mid-settle now stays quiet — the row keeps its lease and is reclaimed after expiry, like any interrupted worker.