feat: enhance train scheduling and contract management features

- Added StationWorkControls to manage loading/unloading phases in TrainScheduleV2DetailPage.
- Implemented API endpoints for recording station work and managing wagon detach requests.
- Updated contract templates to include Ethiopian customs handling options.
- Enhanced shipment forms to collect customs clearing agent details for without-customs bookings.
- Introduced NUMBER_OF_WAGONS as a unit of measure for bulk cargo, allowing customers to specify wagon counts.
- Improved validation for customs clearing agent information in shipment forms.
- Updated various components and services to accommodate new features and ensure data integrity.

apps/edr-freight-api/src/contracts/contract-document-view-model.builder.ts

@@ -122,6 +122,8 @@ export class ContractDocumentViewModelBuilder {
         contract.customsClearingEnabled,
         // Bulk templates are keyed by the contract's cargo type.
         (contract.cargoScope ?? []).find((c) => c.cargoTypeId)?.cargoTypeId,
+        // Ethiopian-customs-only service types resolve to the Ethiopian variant.
+        contract.serviceType?.includesEthiopianCustomsOnly,
       );
       dynamicTemplate = dynamicSource
         ? {