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

cmd/server/noop_repo.go

@@ -39,10 +39,18 @@ func (r *noopAlbumRepo) GetByArtistID(ctx context.Context, artistID string, limi
 	return &domain.SearchResult[domain.Album]{}, nil
 }
 
+func (r *noopAlbumRepo) GetAllByArtistID(ctx context.Context, artistID string) ([]domain.Album, error) {
+	return nil, nil
+}
+
 func (r *noopAlbumRepo) Save(ctx context.Context, album *domain.Album) error {
 	return nil
 }
 
+func (r *noopAlbumRepo) SaveAll(ctx context.Context, albums []domain.Album) error {
+	return nil
+}
+
 type noopTrackRepo struct{}
 
 func (r *noopTrackRepo) GetByID(ctx context.Context, id string) (*domain.Track, error) {