Changes to List scheduled messages

added the optional property request_id to the response with the 400 status

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

added the optional property request_id to the response with the 403 status

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

added the optional property request_id to the response with the 409 status

added the optional property request_id to the response with the 500 status

added the optional property type to the response with the 400 status

added the optional property type to the response with the 401 status

added the optional property type to the response with the 403 status

added the optional property type to the response with the 404 status

added the optional property type to the response with the 409 status

added the optional property type to the response with the 500 status

endpoint added