In the hunt for bot performance, I think we should evaluate if GitHub's GraphQL could be leveraged to combine common queries into fewer calls. I think specifically we could fetch a pull request with all comments, reviews and review comments in one call. This is a pretty common combination of data to be needed by WorkItems.

What we need to check is at least:

1. Can we make it work?
2. Does it improve performance?
3. Can we fit this query model within the resource limits of GitHub?

The GraphQL API has a different way of tracking resource limits, so we will need to make sure our usage still fits within those limits for our usecases. Related to this is the 1 second delay we are incurring between all non GET calls to GitHub, which may or may not be needed for GraphQL POST calls.