GET log (engagements and listens, keyset over at/kind/id), listChanges
title and intoTitle, listCopies workTitle, all via batched lookups.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Engagements store partial dates as value + precision and track field_sources;
lists (list/grouping/thread, grouping-only rating/review) keep dense item
order and snapshot items in history; copies store price in cents. All three
restore through restoreVersion.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
