task_agent_client get_environment_deployment_execution_records does not return a continuation token

The get_environment_deployment_execution_records method in the task_agent_client will accept a continuation token as a parameter but does not return one when called. This means it is not possible to correctly page through the results.

I note that a similar issue for the get_builds method in the build_client was fixed here https://github.com/microsoft/azure-devops-python-api/issues/152. Hopefully it's a case of adding something similar this https://github.com/microsoft/azure-devops-python-api/blob/dev/azure-devops/azure/devops/v5_1/build/build_client.py#L450

從 task_agent_client 中的 get_environment_deployment_execution_records 開始，將其回應處理方式與 build_client.py 第 450 行附近的 get_builds 進行比較，同時參考 issue 152 中提到的修正。確認 API 回應中如何表示 continuation token，並確保該方法回傳它，以便呼叫端可以對結果進行分頁。