feat: video rips and stray copies handle themselves (M498 #5439)

- The resolver also merges cross-release and mismatch groups where Lidarr
  maps exactly one copy: the others fulfil nothing, so removing them opens no
  hole (D-a rule 1). That covers a rip beside the clean copy on another
  release and a wrong-file import Lidarr holds unmapped. With two or more
  mapped copies each fulfils its own release and nothing is removed.
- A track whose file name carries a video-rip marker is held back from radio
  and the system mixes (tracks.source_verdict, migration 0077). It still plays
  when chosen. A renamed file is released; the operator's "fine" sticks.
- Suspect sources shows what was done to each track, with "This one is fine"
  and "Hold back again" (PUT /api/admin/library/suspect-sources/{id}).
- The Liked list prefers a copy that is not held back.

Replacing a rip that has no clean copy is left for the operator to decide.

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

internal/db/dbq/songs.sql.go

@@ -46,14 +46,18 @@ func (q *Queries) LinkTracksAsSong(ctx context.Context, trackIds []pgtype.UUID)
 }
 
 const listTrackSongKeys = `-- name: ListTrackSongKeys :many
-SELECT id, song_key FROM tracks WHERE id = ANY($1::uuid[])
+SELECT id, song_key, (source_verdict IS NOT DISTINCT FROM 'suspect')::boolean AS held_back
+  FROM tracks WHERE id = ANY($1::uuid[])
 `
 
 type ListTrackSongKeysRow struct {
-	ID      pgtype.UUID
-	SongKey pgtype.UUID
+	ID       pgtype.UUID
+	SongKey  pgtype.UUID
+	HeldBack bool
 }
 
+// What the mix writer needs to place a track: its song, and whether it is a
+// video rip held back from the mixes (#5439).
 func (q *Queries) ListTrackSongKeys(ctx context.Context, ids []pgtype.UUID) ([]ListTrackSongKeysRow, error) {
 	rows, err := q.db.Query(ctx, listTrackSongKeys, ids)
 	if err != nil {
@@ -63,7 +67,7 @@ func (q *Queries) ListTrackSongKeys(ctx context.Context, ids []pgtype.UUID) ([]L
 	var items []ListTrackSongKeysRow
 	for rows.Next() {
 		var i ListTrackSongKeysRow
-		if err := rows.Scan(&i.ID, &i.SongKey); err != nil {
+		if err := rows.Scan(&i.ID, &i.SongKey, &i.HeldBack); err != nil {
 			return nil, err
 		}
 		items = append(items, i)