Force fresh HF deploy with version 2.2.0 and new asset cache keys

Make HF startup path simpler and add explicit startup logging

Force Docker rebuild with cache-bust ENV to deploy IST timestamp fix

HF fix: uvicorn-only CMD, defensive mkdir, remove unused numpy, overlay mkdir on save, README troubleshooting

Fix: add checkfirst=True for table creation, use 1 worker

Add Hugging Face Spaces support (Docker, port 7860, non-root user)

Initial commit: SatDetect satellite change detection web app