docs: correct doc-vs-code drift across the canonical docs

A documentation audit against the code surfaced several stale claims:

- Agent count: the roster is 19 AI agents (the UX/UI cell has two devs,
  ux-dev-1 + ux-dev-2), not 18 / a single UX dev. Fixed in README,
  CLAUDE.md, base.md, and docs/ux_ui.
- API: domain routes are mounted under /api, not /api/v1 (the /api/v1
  prefix is the agent gateway only); dropped the non-existent /api/v1/test
  group; fixed the orchestrator-status path in deployment.md.
- Quick Start uvicorn target is roboco.api.app:app (the api package
  deliberately does not export app).
- Verb table: the developer PR verb is open_pr (renamed from
  submit_for_qa); the lifecycle's canonical module is
  foundation/policy/lifecycle.py (enforcement/task_lifecycle.py is a shim).
- Backend team stack: vector store is PostgreSQL + pgvector (via piragi),
  not Qdrant; mypy targets roboco/, not src/.
- .env.example: replaced the phantom Qdrant/OpenAI blocks with the real
  Ollama/RAG settings.

docs/ux_ui/README.md

@@ -4,7 +4,7 @@ Documentation for the UX/UI Cell team.
 
 ## Access
 
-- **READ**: UX/UI Cell (developer, QA, PM, documenter)
+- **READ**: UX/UI Cell (2 developers, QA, PM, documenter)
 - **WRITE**: ux-doc only
 
 ## Contents