Ship&co API: Insurance Restriction Added for Multi-parcel Shipments (FedEx, DHL, UPS)

Ship&co currently does not support setting insurance for multi-parcel shipments with FedEx, DHL, or UPS. While this restriction was enforced in the app, it was not applied to API shipments, allowing invalid requests without error.
With this update, API requests that include insurance for such shipments will now return a proper error, aligning the API behavior with the app and preventing invalid shipments.
Insurance for multi-parcel shipments for these shipping carriers will be supported in the coming months for both app and api.