fix(ops): wait for metrics bridge reload

tests/test_metrics_edge_controlled_apply_service.py

@@ -157,6 +157,27 @@ def test_metrics_canary_requires_ewoooc_product_markers():
     assert _parse_metrics_canary(wrong_exporter) == ("200", False)
 
 
+def test_metrics_canary_waits_for_new_nginx_worker(monkeypatch):
+    from services import metrics_edge_controlled_apply_service as service
+
+    outputs = iter([
+        "forbidden\n__EWOOOC_HTTP_STATUS__:403",
+        (
+            "momo_app_info 1\nmomo_app_health 1\nmomo_database_up 1"
+            "\n__EWOOOC_HTTP_STATUS__:200"
+        ),
+    ])
+
+    monkeypatch.setattr(
+        service,
+        "_run",
+        lambda _command: type("Completed", (), {"stdout": next(outputs)})(),
+    )
+    monkeypatch.setattr(service.time, "sleep", lambda _seconds: None)
+
+    assert service._wait_metrics_canary(["curl"], 10) == ("200", True, 2)
+
+
 def test_target_health_rejects_stale_scrape_url():
     from services.metrics_edge_controlled_apply_service import _target_health_from_payload