feat(cfold): canonicalize custom test layout

tests/cryptpad/custom/test_health_check.py

@@ -0,0 +1,23 @@
+"""cryptpad — parity port of recipe-maintainer's health_check.py (Phase 2 P2).
+
+SOURCE: references/recipe-maintainer/recipe-info/cryptpad/tests/health_check.py
+
+The original asserted HTTP 200 from `https://cryptpad.<DOMAIN_SUFFIX>/`. The cc-ci port preserves
+the assertion shape (200 from the served root) adapted to the ephemeral per-run domain. Runs in
+the custom tier against the shared post-install live deployment.
+"""
+
+from __future__ import annotations
+
+import os
+import sys
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", "..", "runner"))
+from harness import http as harness_http  # noqa: E402
+
+
+def test_cryptpad_returns_200(live_app):
+    """Parity with recipe-info/cryptpad/tests/health_check.py: HTTP 200 from root."""
+    url = f"https://{live_app}/"
+    status, _ = harness_http.retry_http_get(url, expect_status=200, max_wait=60, interval=3)
+    assert status == 200, f"cryptpad at {url} returned HTTP {status} (expected 200)"