feat: fetch all artist albums with caching, filter by type in handler

- Provider fetches all release groups via paginated browse, no type filter
- Service caches all albums in DB, ensures referenced artists exist first
- Server handler filters by album_types (default: album|ep|single), excludes secondary types
- Add secondary_types to domain, DB schema, and MB types
- Add ErrBadRequest handling for MusicBrainz 400 errors
- Replace migrations with single schema.sql
- Add GetAllByArtistID and SaveAll to album repository

internal/domain/types.go

@@ -17,18 +17,19 @@ type Artist struct {
 }
 
 type Album struct {
-	ID          string
-	Title       string
-	Type        string
-	ReleaseDate *time.Time
-	UPC         string
-	TotalTracks int
-	TotalDiscs  int
-	CoverURL    string
-	Artists     []ArtistCredit
-	Label       *Label
-	Genres      []Genre
-	ExternalIDs []ExternalID
+	ID             string
+	Title          string
+	Type           string
+	SecondaryTypes []string
+	ReleaseDate    *time.Time
+	UPC            string
+	TotalTracks    int
+	TotalDiscs     int
+	CoverURL       string
+	Artists        []ArtistCredit
+	Label          *Label
+	Genres         []Genre
+	ExternalIDs    []ExternalID
 }
 
 type Track struct {