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feat: crawler job queue ops and dedup index (0.27.0)

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Adds enqueue / lease / ack_done / ack_failed / release / reap_done on
crawler::jobs, backed by the existing crawler_jobs table. lease() uses
a single FOR UPDATE SKIP LOCKED CTE that also re-claims stale running
rows (crashed-worker recovery), and ack_failed applies an exponential
backoff capped at 1h before retrying.

Migration 0014 adds a partial unique index on
(payload->>'chapter_id') restricted to (pending|running)
sync_chapter_content jobs, so producers can just
INSERT ... ON CONFLICT DO NOTHING without racing each other. The slot
frees again the moment the job leaves the in-flight states, so a
future force-refetch can re-enqueue.

Library-only — no daemon, no API hook. Those land in the next two
phases.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
MechaCat02
2026-05-25 19:59:09 +02:00
parent 89b84252a5
commit 93c7fd63fc
6 changed files with 676 additions and 6 deletions
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backend/Cargo.lock generated
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@@ -1448,7 +1448,7 @@ checksum = "c41e0c4fef86961ac6d6f8a82609f55f31b05e4fce149ac5710e439df7619ba4"
[[package]]
name = "mangalord"
version = "0.26.1"
version = "0.27.0"
dependencies = [
"anyhow",
"argon2",