partner.updated events previously recorded only the field names that
changed (metadata.changes). Now they record metadata.diff — a
{ field: { from, to } } map — by reading the partner before the
findOneAndUpdate and comparing serialized values. Only fields that
actually differ make it into the diff, so a save-without-changes
records an empty diff instead of every DTO key.
The operator audit row's expanded panel renders the diff as a small
inline table (field · from → to). Older audit rows that still carry
metadata.changes fall back to the original chip layout so historical
events stay readable.
Ronni Baslund
0e0cf8d90b