Users manually match an album to the regular edition, but enrichment/
repair keeps treating it as the deluxe (missing songs, renumbered tracks).
Root cause: an album has TWO identities — the enrichment match
(spotify_album_id, which manual-match sets and the worker already honors)
and a SEPARATE canonical version pin (canonical_album_id, added by #777).
The canonical pin is what track-number repair / reorganize / missing-track
detection actually read, and library_manual_match never wrote it — so it
was resolved independently and landed on the deluxe edition.
(So #777 did NOT solve #758: it added canonical pinning, but manual
matches didn't write the pin.)
Fix: a manual ALBUM match on a canonical-recognised source now also pins
AND locks the canonical version to the chosen release:
- new canonical_locked column (same migration pattern as the other
canonical cols).
- set_album_canonical(..., locked=False) gains an atomic WHERE-clause
guard: an auto write can't overwrite a locked pin; a manual write
(locked=True) always wins. get_album_canonical exposes `locked`.
- library_manual_match pins canonical for album matches via the pure
should_pin_manual_canonical(entity_type, source).
The auto resolve job already skips already-pinned albums, so the lock is
protected on two fronts; the new guard also covers any future
re-resolution. A new manual match still overrides.
18 tests: the pure gate (+ a sync-invariant test vs _ALBUM_ID_COLUMNS)
and the DB lock seam (auto can't clobber a manual lock; manual overrides;
auto-over-auto still works). Additive — locked defaults False, so the
auto path is unchanged unless a manual lock exists. Full suite clean.
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