Get tmx file download status

With this endpoint, you can inquire about the status of an tmx file download job.

• If the value of the 'status' attribute is 'pending' or 'processing', you
  should check this endpoint again later.
• If the 'status' is 'failed', the translation has failed to be compiled.
• In case the upload job has been successful, you will receive a "303 - See
  Other" response and you can follow its Location to download the file.
  The download link will be valid for 30 days.