Boots the real arr binary against wiremock Prowlarr/TMDB fakes serving recorded fixtures and a real Transmission container. Adds the env-only ARR_TMDB_URL seam so the daemon's TMDB client can be pointed at the fake. The full add-to-imported run lands on this harness once #21-#23 exist. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>