feat: Update with all 12 gap fixes - SQLModel, Better Auth, OpenAI Agents, Urdu, Voice

fix: Support both JWT_SECRET and JWT_SECRET_KEY env vars

fix: Use psycopg2-binary for PostgreSQL compatibility

fix: Add gitignore and remove env files

fix: Use relative URLs for API calls in production

security: Remove .env and cache files

fix: Update startup script and supervisord config for HF Spaces

feat: Deploy Todo App Phase 5 to Hugging Face Space