fix(server): forward-fix CI — gofmt convert/types + rename unused r in enricher_test

internal/api/types.go

@@ -57,16 +57,16 @@ type ArtistRef struct {
 // divider can group rows by sort order ("The Wall" → "W"). CoverURL points
 // to /api/albums/{id}/cover.
 type AlbumRef struct {
-	ID          string `json:"id"`
-	Title       string `json:"title"`
-	SortTitle   string `json:"sort_title"`
-	ArtistID    string `json:"artist_id"`
-	ArtistName  string `json:"artist_name"`
-	Year        int    `json:"year,omitempty"`
-	TrackCount  int    `json:"track_count"`
-	DurationSec int    `json:"duration_sec"`
-	CoverURL        string  `json:"cover_url"`
-	CoverArtSource  *string `json:"cover_art_source"`
+	ID             string  `json:"id"`
+	Title          string  `json:"title"`
+	SortTitle      string  `json:"sort_title"`
+	ArtistID       string  `json:"artist_id"`
+	ArtistName     string  `json:"artist_name"`
+	Year           int     `json:"year,omitempty"`
+	TrackCount     int     `json:"track_count"`
+	DurationSec    int     `json:"duration_sec"`
+	CoverURL       string  `json:"cover_url"`
+	CoverArtSource *string `json:"cover_art_source"`
 }
 
 // TrackRef is the lightweight track shape used in album details and search.