Fix R128 and remaining ID fields to accept both JSON types

- Track.R128 and TrackShort.R128: float64 → JSONR128 (accepts both JSON number and object)
- All remaining primary ID fields: string → JSONID (accepts both JSON string and number)
  Fixed in: account, artist, clip, concert, feed, label, landing, metatag,
  music_history, pin, queue, radio, search, settings, supplement

internal/models/track.go

@@ -20,7 +20,7 @@ type Track struct {
 	Explicit                 bool             `json:"explicit"`
 	Available                bool             `json:"available"`
 	AvailableForPremiumUsers bool             `json:"available_for_premium_users"`
-	R128                     float64          `json:"r128"`
+	R128                     JSONR128         `json:"r128"`
 	TrackSharingFlag         string           `json:"track_sharing_flag"`
 	Major                    *Major           `json:"major"`
 	Lyrics                   *TrackLyricsInfo `json:"lyrics"`