Expand specification (Aurora Edition v1.1)
- Move to spec/ folder
- Add Aurora to filename
- New sections:
- 14. Development & Deployment
- 15. Testing (backend, frontend, E2E, CI/CD)
- 16. Performance (DB, caching, WebSocket, frontend)
- 17. Security (JWT, validation, SQL injection, XSS, rate limiting)
- 18. Monitoring & Logging (logs, Prometheus, health checks, Sentry)
- 19. Troubleshooting (common issues, diagnostics, recovery)
- Expanded appendices (Glossary, Changelog, Roadmap, API examples, ER diagram)
- Total: 1200+ lines of comprehensive documentation