Enum InventoryTrackingStatus

When the Inventory Status is "Disabled", it behaves as if the store is selling digital goods. Any amount can be sold, the requested quantities are updated, but the available counts do not change.

When the Inventory Status is "Enabled", it behaves as if we are tracking the inventory of physical goods, which is a limited amount that can be sold. Stock will be required to be available to process orders, and available counts will be decremented as orders are processed.