feat(monitoring): improve network activity metrics with live domain request rates and backend identifiers

test/test.email-ops-api.ts

@@ -101,7 +101,13 @@ tap.test('should login as admin for email API tests', async () => {
     password: 'admin',
   });
 
-  adminIdentity = response.identity;
+  const responseIdentity = response.identity;
+  expect(responseIdentity).toBeDefined();
+  if (!responseIdentity) {
+    throw new Error('Expected admin login response to include identity');
+  }
+
+  adminIdentity = responseIdentity;
   expect(adminIdentity.jwt).toBeTruthy();
 });