Changes to Get an agent thread's run tree

added the non-success response with the status 502

added the optional property error/code to the response with the 401 status

added the optional property error/code to the response with the 404 status

added the optional property error/details to the response with the 401 status

added the optional property error/details to the response with the 404 status

added the optional property error/request_id to the response with the 401 status

added the optional property error/request_id to the response with the 404 status

added the optional property error/retryable to the response with the 401 status

added the optional property error/retryable to the response with the 404 status

added the new CANCELLED enum value to the runs/items/status response property for the response status 200

added the new CANCELLING enum value to the runs/items/status response property for the response status 200

added the new FAILED enum value to the runs/items/status response property for the response status 200

added the new QUEUED enum value to the runs/items/status response property for the response status 200

added the new RUNNING enum value to the runs/items/status response property for the response status 200

added the new SUCCEEDED enum value to the runs/items/status response property for the response status 200

endpoint added