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>

web/src/lib/components/AdminTabs.test.ts

@@ -52,7 +52,7 @@ describe('AdminTabs', () => {
     );
   });
 
-  test('renders all eleven tabs in order', () => {
+  test('renders all twelve tabs in order', () => {
     state.pageUrl = new URL('http://localhost/admin');
     render(AdminTabs);
     const links = screen.getAllByRole('link');
@@ -60,6 +60,8 @@ describe('AdminTabs', () => {
       'Overview',
       'Integrations',
       'Requests',
+      // Wanted follows Requests: an approved request goes on the wanted list.
+      'Wanted',
       'Quarantine',
       // Missing files sits with Quarantine and Playback errors: the three
       // surfaces that show tracks needing an operator's attention.