Implement all `DocumentRecord` endpoints

Currently we only implement a few of these endpoints in the incorrectly-named `DocumentSummaryFile` classes. Need to change this class name, and implement the rest of the endpoints.

https://www.postman.com/welikan/workspace/public-welkinhealth-api/documentation/17392652-1923eb91-b82e-4d5f-845a-f5bd1c750481?entity=request-6b550ce4-8748-47f1-ae74-eab3415cb6d2