feat(subsonic): expose replaygain tags

db/db.go

@@ -235,9 +235,15 @@ type Track struct {
 	TagTrackNumber int       `sql:"default: null"`
 	TagDiscNumber  int       `sql:"default: null"`
 	TagBrainzID    string    `sql:"default: null"`
-	TrackStar      *TrackStar
-	TrackRating    *TrackRating
-	AverageRating  float64 `sql:"default: null"`
+
+	ReplayGainTrackGain float32
+	ReplayGainTrackPeak float32
+	ReplayGainAlbumGain float32
+	ReplayGainAlbumPeak float32
+
+	TrackStar     *TrackStar
+	TrackRating   *TrackRating
+	AverageRating float64 `sql:"default: null"`
 }
 
 func (t *Track) AudioLength() int  { return t.Length }

db/migrations.go

@@ -72,6 +72,7 @@ func (db *DB) Migrate(ctx MigrationContext) error {
 		construct(ctx, "202311072309", migrateAlbumInfo),
 		construct(ctx, "202311082304", migrateTemporaryDisplayAlbumArtist),
 		construct(ctx, "202312110003", migrateAddExtraIndexes),
+		construct(ctx, "202405301140", migrateAddReplayGainFields),
 	}
 
 	return gormigrate.
@@ -813,3 +814,7 @@ func migrateAddExtraIndexes(tx *gorm.DB, _ MigrationContext) error {
 		CREATE INDEX idx_artist_appearances_album_id ON "artist_appearances" (album_id);
 	`).Error
 }
+
+func migrateAddReplayGainFields(tx *gorm.DB, _ MigrationContext) error {
+	return tx.AutoMigrate(Track{}).Error
+}