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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>