Port of 0c3b38f8 (bugfix/internal/local-library-tag-fallback) onto current
pre-release. The scanner read metadata from a SINGLE lofty tag
(primary_tag().or(first_tag())) with no per-key fallback to the file's other
tags. Old, repeatedly-retagged collections routinely carry the album /
Album Artist / date only in a secondary tag (ID3v1/APE/Vorbis) while the
primary tag lacks them:
- #447: the missed album tag let the folder-derived backfill land in the
album column and masquerade as metadata (folder-name albums, folder-level
grouping, MIN(year) across mixed folders).
- #507: the missed Album Artist left album_artist NULL, degenerating every
COALESCE(album_artist, artist) to the per-track artist (Various Artists).
extract() now falls back per key across tagged_file.tags() (primary first,
deterministic conflict policy) for title/artist/album/album_artist/genre/
catalog/track/disc/date. Folder backfills stay as-is for genuinely untagged
files. Tests adapted to the AlbumGroupMode signature; 75/75 pass. A full
library rescan picks the fix up (no migration).
km
vicrodh
ee37d65f40