feat: WatchedArtist.showAllTypes toggle (default false)

Adds the per-artist release-type filter toggle: off (default) restricts
a discography view to core studio releases, on shows everything
(live, compilations, etc.).

worker/tests/test_watched_artist_show_all_types.py

@@ -0,0 +1,11 @@
+def test_watched_artist_show_all_types_defaults_false(conn):
+    with conn.cursor() as cur:
+        cur.execute(
+            'INSERT INTO "WatchedArtist" (id, mbid, name, "createdAt") '
+            "VALUES (gen_random_uuid()::text, 'm1', 'X', now()) RETURNING id"
+        )
+        aid = cur.fetchone()[0]
+    conn.commit()
+    with conn.cursor() as cur:
+        cur.execute('SELECT "showAllTypes" FROM "WatchedArtist" WHERE id = %s', (aid,))
+        assert cur.fetchone()[0] is False