GItHub CI branch protection status check

[ethanmusser]

The current master branch protections rely on outdated status checks. These should be updated to instead require the new CI runs to succeed as status checks. To support this, the required CI matrix paths should be aggregated via a single CI status validation workflow.

[ethanmusser]

This has been resolved in the repository configuration. The new branch protection status check examines the single CI status workflow added in #309.