Finding and your answer
SalesOrder.OrderIdentifier column
Not found in this gold boundary
99%
How the model read it
No SalesOrder table or customer-order identifier was observed in the current model. Ledger keys and finance entries do not establish order identity.
Workbook evidence
Cited current gold
Open questions
What defines a unique order across order-management systems or legal entities?
Are revisions, split orders and cancelled orders represented by the same identifier or separate records?