Function list_archived_changes 

pub fn list_archived_changes(
    change_repo: &dyn DomainChangeRepository,
) -> CoreResult<Vec<ArchivedChangeListItem>>

List archived changes as serializable items, sorted by canonical change id.

Each item carries the change id (without any archive date prefix) and the recursive last-modified timestamp formatted via to_iso_millis. Adapters should not reformat the timestamp.