Creates an inventory hold, which keeps the held units from being shipped.

General description

• Currently every hold is placed on an Advance Shipping Notice (ASN): it covers products expected on the receiving. The hold must be created while the receiving's status is awaiting or arrived; a request for an in_progress or received receiving is rejected. Other kinds of holds may become available later.
• Each item holds one product, optionally narrowed down to a single lot number and/or expiration date.
• An item whose scope is already held, the same product with the same lot number and expiration date, is rejected, whether it is this hold or another hold on the same ASN that holds it. A wider and a narrower scope can coexist, so a hold on every lot of a product and a hold on one of its lots both apply to the same units. A scope that was already released can be held again.
• A single ASN can carry several holds, each identified by the returned inventory_hold_uuid.