Maintain stop receiving flag through purchase order interfaces

WMS now supports the stop_recv_flg field for Purchase Order detail interfaces and the PO Detail Stage UI. This helps customers stop or resume receiving for a specific PO line without closing or cancelling the full purchase order.

The field is optional and applies only to the individual PO detail. WMS accepts the field through JSON, XML, CSV, and one-line formats.

Scenario	Behavior
stop_recv_flg = true	WMS blocks future receiving for that PO detail.
stop_recv_flg = false	WMS allows future receiving, subject to standard validations.
Other PO details	Other eligible details remain receivable.
Closed or Cancelled PO	WMS rejects Stop Receiving updates.

Steps to enable and configure

1. Include stop_recv_flg in the PO detail interface when required.
2. For CSV or one-line formats, add the field as the final PO detail field.
3. Use the PO Detail Stage UI to review or update the field when needed.
4. Process the PO detail record.
5. WMS applies the Stop Receiving behaviour to the selected PO detail.