docs(api): update UAT_PLAYBOOK.md §4.0 — new health endpoint path

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>

UAT_PLAYBOOK.md

@@ -21,6 +21,14 @@ GroomBook API is a Hono-based REST service (TypeScript/Node.js) powering the pet
 
 ## Test Cases
 
+### 4.0 Health Check
+
+| # | Scenario | Steps | Expected |
+|---|----------|-------|----------|
+| TC-API-0.1 | Unauthenticated health check | GET /api/health | 200 OK, `{"status":"ok"}` |
+
+> **Note (GRO-1544):** Health endpoint registered on `api` basePath before auth middleware at `/api/health`. The old path `/health` was incorrect (routed to web pod via HTTPRoute `/*` rule).
+
 ### 4.1 Authentication
 
 | # | Scenario | Steps | Expected |

src/index.ts

@@ -58,8 +58,8 @@ app.use(
   })
 );
 
-// Health check (no auth required)
-app.get("/health", (c) => c.json({ status: "ok" }));
+// Health check — no auth required, registered on app at full path before auth middleware
+app.get("/api/health", (c) => c.json({ status: "ok" }));
 
 // Public booking routes — no auth required, must be registered before auth middleware
 app.route("/api/book", bookRouter);