Manually choose which copy to keep per duplicate group

Today the kept "Original" in each duplicate group is chosen by a global strategy (Settings → Duplicates → Smart pick / Keep newest / Keep oldest), which re-picks across all groups. There is no way to hand-pick a specific copy for an individual group.

Request: a per-group control to select which copy is the authoritative one (override the auto-pick for that group), so reviewers can correct cases where the algorithm kept the wrong copy. Raised while reviewing ~2,600 duplicates across a large multi-mailbox import.