Improve reporting of checks in setgithubcheck

It would be nice if the `setgithubcheck` action reported more than just the PR author's status. Currently it reports one of three statuses:

- whether the author is an Adobe employee (and how it determined employeeship)
- whether a signed CLA was found (and what github user it was found for)

It would be nice (for monitoring and debugging purposes) to also report:

- the repo/pr/url of the report

Start by searching the repository for the `setgithubcheck` action and its existing status-reporting logic. Confirm how the current author and CLA statuses are assembled, then extend the report with the repository, pull request, and URL; done means those details appear alongside the existing statuses.

Written by the indexing model from the issue text.