This would be similar to revision-create, but for all public logs (e.g. move, delete, block, protect). Private logs (based on $wgLogRestrictions) must not be included.
I see there are some topics like mediawiki.page-move and mediawiki.page-delete.
I don't think that meets this use case, though (even as a union), since extensions (e.g. Flow) can also define their own log types, which EventBus won't be able to hook into specifically as it's doing now (e.g. with onArticleDeleteComplete -> mediawiki.page-delete). To be sure to catch all, I think it just needs to listen to the log events directly.