Features:
- Flag/escalation system (doit_raise_flag, doit_list_flags, doit_resolve_flag)
- Structured retry context (doit_record_retry, doit_list_retries)
- Admin UI for tenant/API key/project management
- Pinned issues filter

Bug fixes:
- Fix null string passthrough in MCP tool handlers
- Fix lesson tools optional field schemas

Quality:
- 20 new unit tests (14 -> 34 total)
- Post-deploy smoke test script
- Testing requirements process gate in CLAUDE.md
- Risk classification update (product vs project risk)