feat(06-01): add yt-dlp and anthropic dependencies

- Add yt-dlp>=2025.0.0 and anthropic>=0.40.0 to pyproject.toml
- Wire ANTHROPIC_API_KEY env var in docker-compose.prod.yml (empty default)
- Rebuilt Docker image, both packages importable in container

docker-compose.prod.yml

@@ -6,6 +6,7 @@ services:
     environment:
       HOST: 0.0.0.0
       PORT: "8000"
+      ANTHROPIC_API_KEY: "${ANTHROPIC_API_KEY:-}"
     volumes:
       - ./shows:/app/shows
       - ./devices.json:/app/devices.json