Align 500MB upload limits and stream large files

Replace Python proxy with Nginx to support Streamlit WebSockets and fix blank screen

Optimize for HF Spaces: Robust start.sh, Celery worker, and permissions

Deploy to HF Spaces

Add supervisord for multi-process deployment and Railway multi-service config

Fix NumPy 2.x compatibility: pin numpy<2 for SHAP compatibility

Add Streamlit frontend to deployment: run both backend and frontend together

Fix import paths: set PYTHONPATH and use uvicorn app-dir flag for relative imports

Fix Python 3.14 compatibility: update pandas to flexible version and add Fly.io config with Python 3.12

Add deployment configuration (Dockerfile, docker-compose, deployment scripts)