We already validate reviewers reviewing through Bugzilla or GitHub UIs, but we don't validate reviewers in the commit messages themselves.
Pull request: https://github.com/WebKit/WebKit/pull/832
<rdar://problem/93665771>
Committed r294582 (250819@main): <https://commits.webkit.org/250819@main> Reviewed commits have been landed. Closing PR #832 and removing active labels.