chore: update sqlcgen models with play_count/last_played fields

Auto-generated by sqlc from updated schema. Adds PlayCount/LastPlayed
to AudioFile and TrackMetadatum structs, and PlayHistory model.

backend/database/sql/sqlcgen/models.go

@@ -38,6 +38,8 @@ type AudioFile struct {
 	FileSize           int64
 	Basename           string
 	LibraryID          int64
+	PlayCount          int64
+	LastPlayed         sql.NullTime
 }
 
 type CoverArt struct {
@@ -64,6 +66,12 @@ type Library struct {
 	CreatedAt time.Time
 }
 
+type PlayHistory struct {
+	ID          int64
+	AudioFileID int64
+	PlayedAt    time.Time
+}
+
 type PlayerState struct {
 	ID                  int64
 	Volume              int64
@@ -173,4 +181,6 @@ type TrackMetadatum struct {
 	Bitrate            int64
 	FileSize           int64
 	LibraryID          int64
+	PlayCount          int64
+	LastPlayed         sql.NullTime
 }