fix(pi): converge worker failures and thinking state

tests/unit/pi-managed-worker-opener.test.ts

@@ -200,9 +200,9 @@ describe('managed Pi worker opener', () => {
     expect(JSON.stringify(telemetry)).not.toContain(created.id);
     expect(JSON.stringify(telemetry)).not.toContain('PRIVATE MANAGED PROMPT');
     expect(JSON.stringify(telemetry)).not.toContain('provider-secret-value');
-    await first.worker.stop();
-    await reopened.worker.stop();
-    await restarted.worker.stop();
+    await first.worker.stop('test_injection');
+    await reopened.worker.stop('test_injection');
+    await restarted.worker.stop('test_injection');
     await extensionHost.close();
   });