Setting `permitsSkuSharing` argument to `false` when creating a fulfillment service returns an error
- `permitsSkuSharing` set to false now returns an error in both the GraphQL mutation and REST endpoint (2025-10 API version).
- Non‑SKU‑sharing fulfillment services are deprecated; apps must send true or omit the parameter when creating services.
- All new fulfillment services will support SKU sharing, ensuring future compatibility.