Update receiving record when shipment row is updated

Shipment updates don't flow to receiving, leaving warehouse staff without arrival context. It keeps receiving rows current so coordinators can inspect and put away items same day.

Overview

When shipment rows change without propagating, warehouse staff lose arrival context and spend time on manual lookups. This flow keeps Receiving rows updated and tags the original shipment within minutes, so coordinators can inspect and put away inbound stock same day.