fix: an album with missing tracks is wanted back by its release group, not only when it carries a release MBID (#6167)

The release id was only ever used to find the group. 238 albums matched to a
group carried none, so their losses, five of the resolver's wrong-slot
removals among them, were never fetched again.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/db/queries/reacquisition.sql

@@ -21,8 +21,11 @@ RETURNING *;
 --   * it still has at least one track whose file has been missing longer than
 --     the grace window. Measured on missing_since, which reconcile never
 --     re-stamps (#2523), so it is a genuine "gone since" clock;
---   * MusicBrainz can name it: the album and its artist have MBIDs. Albums
---     failing this are counted separately (CountAlbumsMissingWithoutMbid);
+--   * MusicBrainz can name it: the artist has an MBID, and the album a
+--     release MBID or a release group. The release MBID is only ever used to
+--     find the group, and 238 albums matched to a group carried no release
+--     id, so their losses were never wanted back (#6167). Albums failing this
+--     are counted separately (CountAlbumsMissingWithoutMbid);
 --   * it is on the wanted list (#5567): an album taken off the list, or
 --     dropped into the library by hand, is not fetched back;
 --   * no want already covers it: none open, and none held since its files
@@ -41,7 +44,7 @@ SELECT albums.id                 AS album_id,
   JOIN tracks  ON tracks.album_id = albums.id
  WHERE tracks.missing_since IS NOT NULL
    AND tracks.missing_since <= now() - make_interval(hours => sqlc.arg(grace_hours)::int)
-   AND albums.mbid IS NOT NULL
+   AND (albums.mbid IS NOT NULL OR albums.release_group_mbid IS NOT NULL)
    AND artists.mbid IS NOT NULL
  GROUP BY albums.id, albums.title, albums.mbid, albums.release_group_mbid,
           artists.name, artists.mbid
@@ -64,7 +67,7 @@ SELECT COUNT(DISTINCT albums.id)::bigint
   JOIN artists ON artists.id = albums.artist_id
   JOIN tracks  ON tracks.album_id = albums.id
  WHERE tracks.missing_since IS NOT NULL
-   AND (albums.mbid IS NULL OR artists.mbid IS NULL);
+   AND ((albums.mbid IS NULL AND albums.release_group_mbid IS NULL) OR artists.mbid IS NULL);
 
 -- name: WantMissingAlbum :one
 -- Records an album with missing files as wanted. A held want for the same