Files SoulSync (or MusicBrainz Picard) already tagged carry Spotify /
iTunes / MusicBrainz / Deezer / Tidal / AudioDB / Genius / Last.fm IDs in
their metadata. Enrichment workers gate their queues on
{provider}_match_status IS NULL, so reading those IDs back and gap-filling
the {provider}_id + match_status='matched' columns lets the workers skip
the API lookup entirely — big API savings on an already-tagged library.
New manual job in Tools -> Database & Scanning ("Import IDs from File
Tags"): scans every library file, reads embedded IDs, fills any that are
missing in the DB. Background job + progress card, mirroring the
write-tags-batch pattern.
core/library/embedded_id_reconcile.py (pure + tested):
- plan_reconcile(): gap-fill plan for a track + its album + artist. Only
empty id columns are planned; a disagreeing embedded id is a conflict,
never applied.
- apply_reconcile_plan(): one guarded UPDATE per id column —
WHERE id=? AND (col IS NULL OR col=''). The guard makes the fill atomic:
if an enrichment worker matched the same entity between our read and
this write, the UPDATE affects 0 rows instead of clobbering it. Columns
are introspected so a schema missing a provider's columns is skipped.
- reconcile_track_row(): per-track orchestration (id extraction, plan ->
apply, keeping the in-memory parent maps fresh for sibling tracks).
Job hardening: paged track scan (bounded memory), per-page commits (don't
starve concurrent workers), per-file try/finally (one bad file can't abort
the run), counters from real rowcount.
Scope: 19 column-fills across 8 providers. MB *recording* (track) id is
left out (UFID frame the reader doesn't surface; Vorbis key ambiguous) —
MB album+artist are covered. Amazon/ASIN deliberately excluded (ASIN is a
different namespace than the worker's amazon_id). All target columns
verified against the live schema.
Purely additive: new module, two new endpoints, one new Tools card —
no existing behavior changed. 20 unit tests (incl. the concurrency guard).
Full suite clean (only pre-existing soundcloud /app env failures remain).
