Merging organizations or people — when two objects turn out to be the same entity, dedupe non-destructively

Sooner or later two rows ARE the same org (or person) — different imports, different spellings, one with a domain and one without. There's no merge anywhere: nothing re-points edges, unions the lists, or absorbs the loser's slug into aliases. Non-destructive but effective dedupe probably deserves its own microfrontend.