Duplicate an Audience

Creates a private copy of an Audience you can edit: new, independent copies of every member Mind with their profiles, knowledge and embeddings, plus the grounding, sources, formations and finished validation history. Sharing, public links and running jobs are not copied. While the Audience is still being built the copy is its last good state (a member being rewritten is copied as the version it was trained as); copied members without a working version are retrained on their record. An optional idempotency key replays the same copy with status 200; a new copy returns 201.