Implement Bellhop: Matrix-authenticated *arr request portal

- FastAPI backend with async SQLite session storage
- Matrix homeserver authentication (login/logout/session validation via whoami)
- Server-side proxy for Radarr, Sonarr, and Lidarr search & add APIs
- Fire-and-forget Matrix audit log bot for request tracking
- Rate-limited login endpoint (5 req/min per IP via slowapi)
- Single-page Alpine.js frontend with dark theme, media type tabs, search grid
- Dockerfile for single-container deployment
- Secure session cookies (httponly, samesite=strict, secure)

https://claude.ai/code/session_018iMt5qm4j9bk8wzytLC3E6

Dockerfile

@@ -0,0 +1,12 @@
+FROM python:3.12-slim
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+EXPOSE 8000
+
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]