Until we get a definite yes or no on whether talk pages should be used to track the status of the schemas,
I looked for a Phabricator ticket on this, and found #Reading-Admin's own T103202 where Marcel Ruiz Forns comments "Yes, the right place [where the metadata about owners and such ought to be documented] should be the schema talk page"
It's still busy make-work, like much updating of wiki pages to reflect code changes :-/ We want, not just for event logging, but for feature flags and for any config setting: * Give me the MediaWiki/WMF state right now. * Give me a change history.
* Tell me the owner.
Humans can figure it out with git, but this human can't figure out how to automate :) Maybe Legoktm's config database RFC [1] will help.