Create a lot or update its expiration date

Creates a lot for a product, or updates the expiration date of an existing lot. The lot is identified by its unique code inside the store, which is built as <sku>-<lot_code> when sku is sent, or is exactly lot_code when it is not.

• If no lot with that code exists, sku is required and must belong to a product of the store; the lot is created with the given expiration_date (optional).
• If the lot exists, only expiration_date is updated, and only when you send one; omitting it leaves the stored date untouched.
• Moving the date into the future re-validates the lot shortly after the call: a lot that had been expired is reactivated, together with its stock units. Moving it into the past expires the lot.
• expiration_date in the response is returned as an ISO 8601 timestamp at UTC midnight of the stored date.
• status in the response is the lot status in lowercase (active, holded, damaged, expired).