bvandeusenandClaude Opus 5
b8855b480f
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The scan fingerprints only bytes it has not seen, so everything imported before fingerprinting existed, and any row derived by an older fingerprintVersion, needs a pass of its own. That pass is a background worker, not a stage in RunScan. RunScan runs at boot and then every 12h, and an in-flight scan older than an hour is reaped and a second started beside it. A stage would have to stop inside the hour: a few hundred decodes a run, so about a month for a 50k-track library. It would also hold the run in flight and answer manual rescans with 409 while it worked. FingerprintBackfillWorker runs once at start, then hourly. Nothing a pass does (error or panic) can stop the next tick. A pass walks tracks with no fingerprint or a stale version, skipping missing tracks, keyset-paged on id. The cursor is what lets a pass end: an inconclusive attempt writes no row, so a file that keeps timing out would otherwise be re-listed and retried forever. Two decodes at a time, deliberately: they compete with transcoding for CPU and with streaming for the mount. storeFingerprint is now one package function shared by the scan and the worker, and reports whether the attempt was fingerprinted, rejected, inconclusive or failed to store. Progress is a live gauge on the Admin scan card, served by GET /api/admin/library/fingerprints: fingerprinted / rejected / pending of total, with missing tracks excluded so it can reach the end. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01SQ31KQpYbStyK5y58UmPLH