fix(ci): add 30s grace period after services report healthy

Even after nginx is listening on port 80, there can be a brief window
where the first Playwright requests hit still-warming router logic or
upstream connection pool setup, causing inconsistent E2E failures.

Now the readiness step:
1. Polls until both http://localhost:8080 and http://localhost:3000/health
   return HTTP 200 (up to 60 attempts = 10 min max)
2. Once both are confirmed up, sleeps 30 additional seconds before
   proceeding to E2E tests — a settling period for nginx and the Node
   server to fully stabilize

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

.github/workflows/ci.yml

@@ -82,16 +82,22 @@ jobs:
       - name: Wait for services to be ready
         run: |
           echo "Waiting for services to become ready..."
-          for i in $(seq 1 30); do
-            if curl -sf http://localhost:8080 > /dev/null 2>&1 && curl -sf http://localhost:3000/health > /dev/null 2>&1; then
-              echo "Services ready after ${i} attempts"
+          for i in $(seq 1 60); do
+            # Poll both the web root (proves nginx + static app are up) and the
+            # API /health endpoint (proves the Node server is responding).
+            WEB_STATUS=$(curl -sf -o /dev/null -w "%{http_code}" http://localhost:8080 2>/dev/null || echo "000")
+            API_STATUS=$(curl -sf -o /dev/null -w "%{http_code}" http://localhost:3000/health 2>/dev/null || echo "000")
+            if [ "$WEB_STATUS" = "200" ] && [ "$API_STATUS" = "200" ]; then
+              echo "Both services healthy after ${i} attempts (web=$WEB_STATUS, api=$API_STATUS)"
+              echo "Allowing 30s grace period for nginx to fully initialize..."
+              sleep 30
               exit 0
             fi
-            echo "Attempt $i/30: services not ready yet, waiting 10s..."
+            echo "Attempt $i/60: web=$WEB_STATUS api=$API_STATUS — waiting 10s..."
             sleep 10
           done
-          echo "Warning: services may not be fully ready after 30 attempts (5m)"
-        timeout-minutes: 6
+          echo "Warning: services may not be fully ready after 60 attempts (10m)"
+        timeout-minutes: 12
 
       - name: Run E2E tests
         run: pnpm --filter @groombook/e2e test