Add a check_operation_status script

[SteveLasker]

The current script can take a while for the statement to get anchored. Rather than continually run the curl, a check_operation_status.py script allows the user to run and wait for it to complete.

[SteveLasker]

See datatrails/datatrails-docs#726 for doc updates

[honourfish]

Updated to use requests.get(), here is an example failed call:

$ python3 scitt/check_operation_status.py --operation-id assets_4ed3006e-e674-4847-b90f-b513b5ddfda5_events_96688419-b477-4c67-a6f3-e0fe952572a3
Traceback (most recent call last):
  File "scitt/check_operation_status.py", line 104, in <module>
    main()
  File "scitt/check_operation_status.py", line 99, in main
    entry_id = poll_operation_status(args.operation_id, headers)
  File "scitt/check_operation_status.py", line 52, in poll_operation_status
    operation_status = get_operation_status(operation_id, headers)
  File "scitt/check_operation_status.py", line 38, in get_operation_status
    response.raise_for_status()
  File "/home/jgough/.local/lib/python3.8/site-packages/requests/models.py", line 1021, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 401 Client Error: Unauthorized for url: https://app.datatrails.ai/archivist/v1/publicscitt/operations/assets_4ed3006e-e674-4847-b90f-b513b5ddfda5_events_96688419-b477-4c67-a6f3-e0fe952572a3

Here is a succesful call:

$ python3 scitt/check_operation_status.py --operation-id assets_4ed3006e-e674-4847-b90f-b513b5ddfda5_events_96688419-b477-4c67-a6f3-e0fe952572a3
assets_4ed3006e-e674-4847-b90f-b513b5ddfda5_events_96688419-b477-4c67-a6f3-e0fe952572a3