feat(cfold): canonicalize custom test layout

tests/immich/custom/test_health_check.py

@@ -0,0 +1,26 @@
+"""immich — parity port of recipe-maintainer's health_check.py (Phase 2 P2).
+
+SOURCE: references/recipe-maintainer/recipe-info/immich/tests/health_check.py
+
+The original asserted HTTP 200 from `https://immich.<DOMAIN_SUFFIX>`. The cc-ci port preserves the
+assertion shape — non-error HTTP from the served root — adapted to the ephemeral per-run domain."""
+
+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_immich_returns_200(live_app):
+    url = f"https://{live_app}/"
+    status, _ = harness_http.retry_http_get(
+        url, expect_status=(200, 301, 302), max_wait=60, interval=3
+    )
+    assert status in (
+        200,
+        301,
+        302,
+    ), f"immich at {url} returned HTTP {status} (expected 200/301/302)"