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.).

web/prisma/migrations/20260711160249_watched_artist_show_all_types/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "WatchedArtist" ADD COLUMN     "showAllTypes" BOOLEAN NOT NULL DEFAULT false;

web/prisma/schema.prisma

@@ -97,6 +97,7 @@ model WatchedArtist {
   mbid              String             @unique
   name              String
   autoMonitorFuture Boolean            @default(false)
+  showAllTypes      Boolean            @default(false)
   monitorFrom       DateTime           @default(now())
   lastPolledAt      DateTime?
   createdAt         DateTime           @default(now())