Process EDI documents between YU and Shandex

997	Functional acknowledgment	Tell Shandex we received an EDI
944	Stock transfer receipt	Receive qty and lots from replenishment shipment
947	Inventory advice	Tell Stash of Q and R status inventory
846	Inventory inquiry	Inventory comparison
867	Resale report	Tell Stash qty, price, and lot sold
943	Stock transfer	Tell Shandex qty and lots being shipped

master_controller takes EDI files from the Shandex FTP, processes them, and loads our EDI files.

Sales come in via 867 and the shandex_dashboard script stores which files have been received.
The corresponding control numbers can be matched to X3 Sales Deliveries in the YLICPLATE_0 field.