[Feature]: Further improve Globus integration via `globus_sdk.UserApp`

[forsyth2]

How will this affect the next version number?

Small improvement (increment PATCH version)

Is your feature request related to a problem?

There have been several Globus authentication/integration issues to resolve. Some of these have fixes already, but in any case, zstash could benefit from improved Globus integration.

Issue	Fix
Token timeout (step 6 from the list in #339)	#407 (potentially already fixed on main via #380 & #397)
Tar files not deleting when --non-blocking is set: #374	#405 (+ the test in #404)
update too slow for HR: #409	#411 (closed), #412
check too slow for HR: #410	#411 (closed), #412
Better handle token file (i.e., store multiple tokens, allow user to specify a token file): #398	#408
Support Globus 4.0: #395	#406

Note: #409/#410 aren't actually Globus-specific.

Describe the solution you'd like

@NickolausDS suggested using globus_sdk.UserApp. For example:

with globus_sdk.UserApp(
    "detect-data-access-example", client_id=NATIVE_CLIENT_ID
) as app:
    # Handles saving/loading tokens
    transfer_client = globus_sdk.TransferClient(app=app)

It would also be useful to review https://globus-sdk-python.readthedocs.io/en/stable/user_guide/usage_patterns/data_transfer/detecting_data_access/index.html.

Describe alternatives you've considered

No response

Additional context

No response