retrieve complete album list in _fetch_folders

[gordonaspin]

Proposed change

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New service (thank you!)
• New feature (which adds functionality to an existing service)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests
• Documentation or code sample

Example of code:

def _fetch_folders(self):
    url = f"{self.service_endpoint}/records/query?{urlencode(self.params)}"
    json_data = (
        '{"query":{"recordType":"CPLAlbumByPositionLive"},'
        '"zoneID":{"zoneName":"PrimarySync"}}'
    )

    request = self.session.post(
        url, data=json_data, headers={"Content-type": "text/plain"}
    )

    response = request.json()

    records = response["records"]
    while 'continuationMarker' in response:
        json_data = (
        '{"query":{"recordType":"CPLAlbumByPositionLive"},'
        '"zoneID":{"zoneName":"PrimarySync"},'
        '"continuationMarker":"' + response['continuationMarker'] + '"}'
        )
        request = self.session.post(
            url, data=json_data, headers={"Content-type": "text/plain"}
        )
        response = request.json()
        records.extend(response["records"])

    return records

Additional information

• This PR fixes or closes issue: fixes #388
• This PR is related to issue:

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated to README