feat(lidarr): ask Lidarr for release groups; repair stored release-id requests (M483 #5244)

Lidarr's metadata is keyed by MusicBrainz release group, but re-acquisition
requested albums by their release id, so every add came back "not found".

- Sweeper requests an album by its tag-supplied release group, else the one
  MusicBrainz names (cached onto the album). An album MusicBrainz cannot name
  is skipped and counted, with no attempt spent.
- Reconciler: an add refused as not found re-reads the request's album id as
  a release (library first, then MusicBrainz), rewrites the request to the
  group and adds again. This repairs the requests already stored.
- Completion matches an album by release id or release group, and only once a
  track of it is on disk, so a re-acquisition request no longer completes
  against the row of the album it is trying to bring back.

Closes #5241.

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

internal/lidarrrequests/reconciler_integration_test.go

@@ -152,6 +152,7 @@ func TestReconciler_MatchesAlbumByMBID(t *testing.T) {
 
 	artist := seedArtist(t, q, "Test Artist", artistMBID)
 	album := seedAlbum(t, q, artist.ID, "Test Album", albumMBID)
+	_ = seedTrack(t, q, album.ID, artist.ID, "Album Track", "/music/album-test/01.flac")
 
 	req := seedApprovedRequestDirect(t, q, user, CreateParams{
 		Kind: "album", LidarrArtistMBID: artistMBID, ArtistName: "Test Artist",