GetPagedAsync resolved WorkOrderNumber/Site/Service, WorkOrderClosed, and
WorkOrderId only through Dispatch.WorkOrderId, so a dispatch linked to its
work order solely through DispatchWorkOrders surfaced blank WO context,
workOrderClosed:false, and zero exposure. Resolve the effective work order
using the same primary-plus-linked convention as GetWorkOrderIdForUpliftAsync
and GetApprovedExposureForWorkOrdersAsync via a single work-order lookup.
