Pulling GitHub into the kernel process

Stars are pretty meaningless to workflows, so that doesn't seem all that important. Yes, issues and PRs being attributed to user accounts makes it harder to find out who to contact about it once moving, but that's the case if someone changes their email address (say, employment change, de-Googlification, or whatever).

In any case, the important bits are still retrievable just as easily in an email workflow. Using that information can be easier or harder depending on circumstances, but there's no guarantee that any of that works in an arbitrary future anyways.