Inventory notes need adjustment reasons

A local store inventory note should record why stock changed, not only the number shown.

For local stores, an inventory note that only says “3 left” is weaker than one that records source and reason. A count can change because of sale, return, damage, transfer, display sample, manual correction, or held pickup. If the reason is visible, staff can answer customers with a useful boundary instead of making accidental promises from an old number.