Accept HTTP 201 for worker registration

Author: durable-workflow-ops

src/V2/Worker/WorkerProtocolClient.php

@@ -131,7 +131,7 @@ public function registerWorker(
             $body['max_concurrent_activity_tasks'] = $maxConcurrentActivityTasks;
         }
 
-        $response = $this->workerPost($this->workerApiPath.'/register', $body);
+        $response = $this->workerPost($this->workerApiPath.'/register', $body, allowedStatuses: [200, 201]);
 
         $this->registeredWorkerId = $workerId;
         $this->registeredTaskQueue = $taskQueue;

tests/Unit/V2/WorkerProtocolClientTest.php

@@ -34,7 +34,7 @@ public function testRegisterWorkerSendsWorkerProtocolHeadersAndBody(): void
                 ),
             ];
 
-            return $http->response(['ok' => true, 'heartbeat_interval_seconds' => 60]);
+            return $http->response(['ok' => true, 'heartbeat_interval_seconds' => 60], 201);
         });
 
         $client = new WorkerProtocolClient($http, 'http://server:8080/', 'test-token', 'default');