addendum 25: DOCFIX-093 batch-3 window do-doc + OpenBao research draft + H5 embed + stderr-sweep inventory ...

Operator-away autonomous batch complete (addenda 23-25). Repo-side queue
empty except H4 (main-chat backlog coordination) ; all remaining work is
the operator-present live window per the new do-doc.

Revert: per addendum-25 REVERT line.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>