- upsertEntry inserts with ON CONFLICT DO NOTHING and patches through the update path,
so a concurrent creator never aborts the caller's transaction on Postgres.
- Undoing a move deletes the forward alias and writes no reverse alias.
- Merging into an existing entry keeps 'user' field_sources on combined fields, carries
the moved entry's field_sources as-is when reviving a deleted target, concatenates
differing review/private notes, records a dropped rating in history, and writes history
for re-parented engagements (restorable).
- Moves re-point this user's copies (with history) and list items to the target work.
- rejectSuggestion requires a pending suggestion; engagements of a deleted entry are not
editable; restoring an entry does not re-check custom fields against current definitions.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
