Final cleanup: Verified auth and stock data working perfectly

Verifying bcrypt fix and versioning

Switch to direct bcrypt to fix 72-byte error

Add debug trace to signup

Update health check and simplify DB path

Add test script and fix DB path logic

Fix main.py import error

Add logs, auto-create tables, and serve frontend

Restore backend services

Update backend/requirements.txt

Fix: Provide default values for required environment variables

Initial commit for deployment