Add Continuation Token Support For Releases

As the official REST API for listing releases only supports returning up to 100 results per request (even with $Top values greater than 100), the API returns a continuation token in the "x-ms-continuationtoken" response header.

https://learn.microsoft.com/en-us/rest/api/azure/devops/release/releases/list?view=azure-devops-server-rest-7.0&tabs=HTTP

This PR introduces support to loop sending GET requests to the endpoint and passing the continuation token received (if any) along in the query string parameters. For a sufficiently large time period, this raises the limit of the number of results returned from 100 to the real value.

Before:

After:

I'm happy to extend this functionality to other endpoints that require continuation tokens if this PR gets approval.

Also changes the case of the 3 as statements in the dockerfile to mitigate the build warnings.

webdevops / azure-devops-exporter

Add Continuation Token Support For Releases #113

Quality Gate passed