test(observability): include health in smoke suite

scripts/check_observability_pages.py

@@ -17,6 +17,12 @@ from observability_contract import CSS_ASSET_CHECKS, OBSERVABILITY_PAGES
 
 MIN_HTML_BYTES = 2500
 
+HEALTH_CHECK = (
+    "/health",
+    "App Health",
+    ("healthy",),
+)
+
 GLOBAL_REQUIRED_MARKERS = [
     "momo-observability-mode",
     "observability-system.css",
@@ -54,6 +60,27 @@ def main() -> int:
     failed = False
     print(f"Observability page smoke: {args.base_url.rstrip('/')}")
 
+    health_path, health_label, health_markers = HEALTH_CHECK
+    try:
+        status, body = fetch_page(args.base_url, health_path, args.timeout)
+        missing_markers = [marker for marker in health_markers if marker not in body]
+        if status != 200 or missing_markers:
+            issues = []
+            if status != 200:
+                issues.append("bad_status")
+            if missing_markers:
+                issues.append(f"missing_health_markers={missing_markers}")
+            print(f"- {health_label}: HTTP {status}, issues={issues}, FAIL")
+            failed = True
+        else:
+            print(f"- {health_label}: HTTP {status}, markers=ok")
+    except urllib.error.HTTPError as exc:
+        print(f"- {health_label}: HTTP {exc.code}, FAIL")
+        failed = True
+    except Exception as exc:
+        print(f"- {health_label}: {type(exc).__name__}: {exc}, FAIL")
+        failed = True
+
     for page in OBSERVABILITY_PAGES:
         try:
             status, html = fetch_page(args.base_url, page.url, args.timeout)