feat: a held album below the quality you settle for, or holding a video rip, stays wanted for a better copy, and the import replaces the old tracks with their likes and plays carried over (M502 #5524)

- acquisition_settings.upgrade_until (default High quality lossy, Lidarr's
  cutoff, note #5527; "" is off), an "Upgrade until" row under Searching.
- The wanted worker judges held albums hourly: tier per format from size per
  second (the scanner records no bitrate), the album's worst. Below the
  cutoff it is wanted for quality; a video rip among its tracks always.
- The schedule searches upgrades weekly, after open wants; a release no
  better than the copy held is refused ("not_better").
- The import matches each file to the track it would replace (recording,
  then disc/track) and replaces it when it is a rip or the file is a better
  tier: over the same path in one rename, or filed beside it and the old
  track folded in (library.ReplaceTrack: file first, then foldTrackInto).
  Nothing better: the release is set aside.
- Collection › Upgrades (Lidarr's Cutoff Unmet); Suspect sources says when a
  clean copy was looked for instead of Lidarr's search.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/api/admin_wanted.go

@@ -39,6 +39,10 @@ type wantView struct {
 	WantedAt         string   `json:"wanted_at"`
 	HeldAt           *string  `json:"held_at"`
 	ImageURL         string   `json:"image_url"`
+	// Upgrade: why a held album is wanted again, quality or rip, and
+	// HeldQuality what the library's copy is (#5524).
+	Upgrade     string `json:"upgrade,omitempty"`
+	HeldQuality string `json:"held_quality,omitempty"`
 	// Search is the schedule's last look; Grab the download running (#5521).
 	Search *wantSearchView `json:"search"`
 	Grab   *wantGrabView   `json:"grab"`
@@ -80,6 +84,8 @@ type wantCounts struct {
 	Wanted    int64 `json:"wanted"`
 	Missing   int64 `json:"missing"`
 	Held      int64 `json:"held"`
+	// Upgrades: held albums wanted for a better copy (#5524).
+	Upgrades  int64 `json:"upgrades"`
 	Following int64 `json:"following"`
 	// Activity: downloads running; Attention: of those, the ones waiting on
 	// a person; Blocked: releases set aside (#5522).
@@ -173,7 +179,7 @@ func (h *handlers) wantsHeader(r *http.Request, q *dbq.Queries) (wantCounts, lib
 		lib.ListedAt = &at
 	}
 	return wantCounts{Artists: counts.Artists, Unmatched: counts.Unmatched, Wanted: counts.Wanted, Missing: counts.Missing, Held: counts.Held,
-		Following: counts.Following, Activity: counts.Activity, Attention: counts.Attention, Blocked: counts.Blocked}, lib, nil
+		Upgrades: counts.Upgrades, Following: counts.Following, Activity: counts.Activity, Attention: counts.Attention, Blocked: counts.Blocked}, lib, nil
 }
 
 func offsetParam(r *http.Request) int {
@@ -220,8 +226,9 @@ func (h *handlers) handleListWantArtists(w http.ResponseWriter, r *http.Request)
 }
 
 // handleListWants implements
-// GET /api/admin/wanted?state=wanted|missing|held|all&artist=&q=&offset=.
-// wanted is everything open but missing files. Each list runs artist by
+// GET /api/admin/wanted?state=wanted|missing|upgrade|held|all&artist=&q=&offset=.
+// wanted is everything open but missing files; upgrade the held albums
+// wanted for a better copy (#5524). Each list runs artist by
 // artist, A–Z, like the library (#5572); q narrows it to an artist or
 // album, and artist to one artist's page, which it then heads.
 func (h *handlers) handleListWants(w http.ResponseWriter, r *http.Request) {
@@ -229,8 +236,8 @@ func (h *handlers) handleListWants(w http.ResponseWriter, r *http.Request) {
 	if state == "" {
 		state = "wanted"
 	}
-	if state != "wanted" && state != "missing" && state != "held" && state != "all" {
-		writeErr(w, apierror.BadRequest("bad_state", "state must be wanted, missing, held or all"))
+	if state != "wanted" && state != "missing" && state != "upgrade" && state != "held" && state != "all" {
+		writeErr(w, apierror.BadRequest("bad_state", "state must be wanted, missing, upgrade, held or all"))
 		return
 	}
 	offset := offsetParam(r)
@@ -269,7 +276,7 @@ func (h *handlers) handleListWants(w http.ResponseWriter, r *http.Request) {
 			ArtistMBID: row.ArtistMbid, ArtistName: row.ArtistName,
 			PrimaryType: row.PrimaryType, SecondaryTypes: row.SecondaryTypes,
 			Year: first4(row.FirstReleaseDate), Reason: row.Reason,
-			WantedAt: formatTimestamp(row.WantedAt),
+			WantedAt: formatTimestamp(row.WantedAt), Upgrade: row.Upgrade, HeldQuality: row.HeldQuality,
 			ImageURL: groupArtURL(musicbrainz.ReleaseGroup{MBID: row.ReleaseGroupMbid, Title: row.Title, ArtistCredit: row.ArtistName}),
 		}
 		if row.LibraryArtistID.Valid {