feat: a wanted list — follow artists on release-type profiles; requests and re-acquisition become wants (M502 #5520)

Minstrel keeps its own list of what it is to get, keyed by MusicBrainz
release group. A want comes from an approved request, a new release by a
followed artist, or an album whose files went missing, and is held once the
library has a full edition of it.

- Migration 0081: release_type_profiles (Standard seeded: Album, EP,
  Single, studio only), follows, follow_seen_groups and wants.
  lidarr_requests becomes requests with plain *_mbid columns; approved
  album and track requests move onto the wanted list, approved artist
  requests become follows, and the library's album artists start out
  followed. missing_reacquisitions and the retry settings go.
- internal/wanted: follows are checked against MusicBrainz discographies
  daily. The first check sets a baseline, and only releases after it are
  wanted unless the follow asked for what already exists. Profiles filter
  by primary and secondary type, so live recordings stay out unless a
  profile ticks Live.
- internal/requests (was lidarrrequests): approving puts the request on
  the wanted list, and an artist request can be approved on a chosen
  profile. A request completes when its want is held.
- The re-acquisition sweeper wants a missing album back instead of asking
  Lidarr; searching for it is the search schedule's (#5521).
- Web: an admin Wanted page (Wanted, Missing files, Held, Following), a
  follow control on artist pages, a release-type profiles card on
  Integrations, "Approve on a profile" on Requests, and want state on
  Missing files. The artist detail API returns the artist's MBID.
- Android: the request body sends artist_mbid, album_mbid and track_mbid.

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

internal/api/notify_producers.go

@@ -6,8 +6,8 @@ import (
 	"github.com/jackc/pgx/v5/pgtype"
 
 	"git.fabledsword.com/bvandeusen/minstrel/internal/db/dbq"
-	"git.fabledsword.com/bvandeusen/minstrel/internal/lidarrrequests"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/notifications"
+	"git.fabledsword.com/bvandeusen/minstrel/internal/requests"
 )
 
 // Helpers for the handlers that produce notifications (M489). Every call is
@@ -22,17 +22,17 @@ func userLabel(u dbq.User) string {
 	return u.Username
 }
 
-func requestPayload(row dbq.LidarrRequest) notifications.Payload {
+func requestPayload(row dbq.Request) notifications.Payload {
 	return notifications.Payload{
 		RequestID:   uuidToString(row.ID),
 		RequestKind: string(row.Kind),
-		Name:        lidarrrequests.DisplayName(row),
+		Name:        requests.DisplayName(row),
 	}
 }
 
 // notifyRequestDecided tells the requester an admin approved or declined
 // their request. An admin deciding their own request needs no notice.
-func (h *handlers) notifyRequestDecided(ctx context.Context, kind notifications.Kind, admin dbq.User, row dbq.LidarrRequest, reason string) {
+func (h *handlers) notifyRequestDecided(ctx context.Context, kind notifications.Kind, admin dbq.User, row dbq.Request, reason string) {
 	if row.UserID == admin.ID {
 		return
 	}