- Add docs/features/terminal.md with user guide, connection states,
keyboard shortcuts, protocol details, and troubleshooting
- Update docs/architecture/frontend.md with terminal component stack,
connection hook behavior, and data flow diagrams
- Update docs/architecture/backend.md with terminal system architecture,
protocol reference, message batching, and reconnect behavior
- Update docs/README.md to include terminal in feature list
- Create enhanced health endpoints with /health and /health/db
- Add comprehensive docstrings to all API endpoints
- Add Pydantic response models with Field descriptions
- Create apps/api/README.md with setup guide
- Create ADR-001 for session auth decision
- Create ADR-002 for async SQLAlchemy decision
- Quality gates: Python syntax OK, TypeScript OK