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/lidarr_test.go

@@ -13,13 +13,13 @@ import (
 // Lidarr search they once sat beside is now the catalogue search
 // (catalogue_test.go, M502 #5519).
 
-// resetLidarrState clears lidarr_requests rows and resets lidarr_config
+// resetLidarrState clears requests rows and resets lidarr_config
 // to the factory-default state (enabled=false, nulls) between tests.
 func resetLidarrState(t *testing.T, h *handlers) {
 	t.Helper()
 	ctx := context.Background()
 	if _, err := h.pool.Exec(ctx,
-		"DELETE FROM lidarr_requests; UPDATE lidarr_config SET enabled=false, base_url=NULL, api_key=NULL WHERE id=1",
+		"DELETE FROM requests; UPDATE lidarr_config SET enabled=false, base_url=NULL, api_key=NULL WHERE id=1",
 	); err != nil {
 		t.Fatalf("resetLidarrState: %v", err)
 	}