feat: add orchestrator shadow observability

agent-run-gateway.test.mjs

@@ -420,13 +420,15 @@ test('code run shadow observation is fire-and-forget and records completion sepa
     (event) => event.eventType === 'workflow_shadow_completed',
   ));
   const event = pool.events.find((item) => item.eventType === 'workflow_shadow_completed');
-  assert.deepEqual(JSON.parse(event.dataJson), {
-    engine: 'langgraph',
-    mode: 'shadow',
-    configVersion: 3,
-    status: 'succeeded',
-    phase: 'completed',
-  });
+  const eventData = JSON.parse(event.dataJson);
+  assert.equal(eventData.engine, 'langgraph');
+  assert.equal(eventData.mode, 'shadow');
+  assert.equal(eventData.configVersion, 3);
+  assert.equal(eventData.status, 'succeeded');
+  assert.equal(eventData.phase, 'completed');
+  assert.equal(eventData.taskType, 'repo_refactor');
+  assert.equal(eventData.executorAdapter, null);
+  assert.equal(Number.isFinite(eventData.latencyMs), true);
 });
 
 test('shadow observer failure cannot fail a Native run and chat runs are not observed', async () => {