Creates a new draft in a live Autonomy Zone from the intent policies in force of this AIP (their sentences, answers, rules, cases and citations, marked confirmed), planned in monitor, and answers 201 {draft_public_id, zone_id, org_unit_id}; the draft is read with GET /aip/drafts/{public_id} and ratified like any other. The new AIP has its own id and history, and its provenance names the source (copied_from); evidence stays with the source. Copying into the source's own zone is allowed. Makes no AI call. A retry with the same Idempotency-Key returns the first draft and creates no second one. 409 RETIRED for a deleted source, 404 ZONE_NOT_FOUND, 422 ZONE_UNAVAILABLE for a retired zone.
Optional. Makes the request safe to retry: the same key and the same request, within 24 hours, returns the stored response with Idempotent-Replayed: true and runs once.