Delete a product

Builds or rebuilds the product kit: cutouts from the raw photos, the generated angle set (`full: true` = 8, or an explicit `angles` list), the fidelity check and the structured facts. Asynchronous — returns a queued job whose result publishes onto the product. Requires an Idempotency-Key. The first 5 kits per workspace are included; the reservation is still made and refunded on settlement. An empty body asks for the free reference sheet and answers 202 `{ status: queued, kind: reference_sheet }`. Quote first: send `quote_only: true` to get a `quote_id` and the credits (200, no charge, valid for 10 minutes), then send the same body with that `quote_id` and the same Idempotency-Key. The confirm charges exactly the quoted credits. A confirm whose input, price or kit version differs from the quote is refused, and a retried confirm returns the first answer and is never charged twice. With `quote_only` or `quote_id` and neither `full` nor `angles`, the call builds the 4 core angles. A body with no quote field still builds in one step.