Added TC-API-0.1 for GET /api/health (unauthenticated).
Corrected path from /health to /api/health (GRO-1544).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
The health check was registered on `app` at `/health`, but the HTTPRoute
routes `/api/*` to the API pod. Since auth middleware protects the /api
basePath, GET /api/health fell through to authMiddleware → 401.
Now registered on `api` before auth middleware at /api/health.
Updated UAT_PLAYBOOK.md §GRO-1485 — new health endpoint path.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>