Taylor Eernisse 405e5370dc feat(sync): concurrent drains, atomic watermarks, graceful Ctrl+C shutdown ...

Three fixes to the sync pipeline:

1. Atomic watermarks: wrap complete_job + update_watermark in a single
   SQLite transaction so crash between them can't leave partial state.

2. Concurrent drain loops: prefetch HTTP requests via join_all (batch
   size = dependent_concurrency), then write serially to DB. Reduces
   ~9K sequential requests from ~19 min to ~2.4 min.

3. Graceful shutdown: install Ctrl+C handler via ShutdownSignal
   (Arc<AtomicBool>), thread through orchestrator/CLI, release locked
   jobs on interrupt, record sync_run as "failed".

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-02-06 11:22:04 -05:00

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