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>
