Complete v1.2.0 implementation with:
- FastAPI backend with CTT scoring (exact Excel formulas)
- IRT 1PL calibration engine with >80% coverage
- CAT adaptive selection using Fisher information
- AI question generation via OpenRouter
- WordPress REST API integration for multisite
- Admin panel with FastAPI Admin 1.0.4
- Excel import/export for tryout data
- Multi-format reporting (PDF, CSV, JSON)
- Manual/automatic normalization modes
- Comprehensive test suite and documentation
All modules complete and validated against PRD v1.1.
