fix(api): add timeouts for OIDC discovery fetch and DB connection

- OIDC discovery fetch in initAuth() now has a 5s AbortSignal.timeout
  to fail fast instead of hanging indefinitely when the auth server is unreachable.
  This was identified as a root cause of startup ECONNRESET crashes on UAT
  where ztunnel drops TCP connections before headers arrive.

- DB postgres client now sets connect_timeout: 5 so failed connection attempts
  fail fast rather than hanging the startup sequence.

- Graceful shutdown timeout tightened to 8s (from 10s) to avoid
  getting killed by Kubernetes liveness-probe deadline while draining.

Fixes GRO-1678.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

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 |

packages/db/src/index.ts

@@ -12,7 +12,7 @@ export function getDb() {
   if (_db) return _db;
   const url = process.env.DATABASE_URL;
   if (!url) throw new Error("DATABASE_URL is not set");
-  const client = postgres(url, { max: 10 });
+  const client = postgres(url, { max: 10, connect_timeout: 5 });
   _db = drizzle(client, { schema });
   return _db;
 }

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);
@@ -282,14 +282,16 @@ startReminderScheduler();
 
 function shutdown() {
   console.log("Shutting down gracefully...");
+  // SIGTERM/SIGINT → server.close() → callback → process.exit(0)
+  // If graceful close takes >8s, force-exit to avoid being killed undrained
+  setTimeout(() => {
+    console.error("Graceful close timeout — forcing exit");
+    process.exit(1);
+  }, 8_000);
   server.close(() => {
     console.log("HTTP server closed");
     process.exit(0);
   });
-  setTimeout(() => {
-    console.error("Forced shutdown after timeout");
-    process.exit(1);
-  }, 10_000);
 }
 
 process.on("SIGTERM", shutdown);

src/lib/auth.ts

@@ -186,7 +186,9 @@ export async function initAuth(): Promise<void> {
     const discoveryUrlStr = `${providerConfig.issuerUrl}/.well-known/openid-configuration`;
     let oidcConfig: Record<string, string> = {};
     try {
-      const discoveryRes = await fetch(discoveryUrlStr);
+      const discoveryRes = await fetch(discoveryUrlStr, {
+        signal: AbortSignal.timeout(5000),
+      });
       if (discoveryRes.ok) {
         const discovery = await discoveryRes.json() as {
           authorization_endpoint?: string;