Allow orthanc anon to run without connecting to Azure

[stefpiatek]

Definition of Done / Acceptance Criteria

• Orthanc anon can be configured not to try to connect to azure (as this currently blocks upload work)
  • .env file should be able to configure where whether we ever try to connect to azure
  • pixl.py plugin in orthanc anon uses the variable to gate connection to azure
    • AzureDICOMTokenRefresh and AzureAccessToken should not be run if the config disables it

Testing

No response

Documentation

No response

Dependencies

No response

Details and Comments

Had done some commenting out of code to get test out upload into DSH in pixl_test, should have a long term solution for this

[milanmlft]

So this is why I added https://github.com/UCLH-Foundry/PIXL/blob/044286040f88d3219c35a2a46ea14a2e4705e17e/orthanc/orthanc-anon/plugin/pixl.py#L217-L219 in #268. _azure_available() checks if the AZ_DICOM_ENDPOINT_CLIENT_ID env variable is set, and if it's not then AzureDICOMTokenRefresh doesn't get called. But might have missed something. Which lines of code did you have to comment out to get it to work?

[stefpiatek]

Yeah that's what I said about missing it that method existed when chatting about it in our standup. Only thing to do on this ticket now is to make sure that's documented which is incoming