feat(trading-twins): Finalize Booking Engine & Infrastructure [31988f42]

- Implemented 'Direct Calendar Booking' logic replacing MS Bookings API.
- Integrated Dual-App architecture for Graph API (Sender vs. Reader permissions).
- Added FastAPI feedback server for Teams and Email interactions.
- Configured Nginx proxy for public feedback URL access.
- Updated Docker configuration (ports, env vars, dependencies).
- Finalized documentation in lead-engine/README.md.

lead-engine/Dockerfile

@@ -5,8 +5,11 @@ WORKDIR /app
 COPY . .
 
 # Install dependencies required for ingestion and DB
-RUN pip install streamlit pandas requests python-dotenv
+RUN pip install streamlit pandas requests python-dotenv fastapi "uvicorn[standard]" msal
 
 ENV PYTHONUNBUFFERED=1
+EXPOSE 8501
+EXPOSE 8004
 # Start monitor in background and streamlit in foreground
 CMD ["sh", "-c", "python monitor.py & streamlit run app.py --server.port=8501 --server.address=0.0.0.0"]
+