add quantity cap for GENERAL contracts and implement capacity tracking

- Updated ContractClearanceService and ContractsController to remove region parameter from queue method.
- Enhanced ContractsRepository to attach contract files for download and added attachContractFiles method.
- Modified ContractsService to persist cargo scope with quantity cap based on contract kind.
- Introduced quantityCap field in CreateContractCargoScopeDto and ContractCargoScope entity.
- Implemented capacity tracking in the frontend with ContractCapacityNotice component to display remaining bookable quantities.
- Updated various components and services to support new capacity features, including hooks and API calls.
- Added migration to include quantity_cap column in contract_cargo_scope table.

apps/edr-freight-api/src/modules/contracts/contract-clearance.service.ts

@@ -481,11 +481,7 @@ export class ContractClearanceService {
   /**
    * GL ET queue: customs (Path B) contracts awaiting pre-booking document review.
    */
-  async queue(
-    filter: FilterContractDto,
-    region?: string,
-  ): Promise<PaginatedContracts> {
-    void region; // single ET pre-booking queue today; region reserved for split
+  async queue(filter: FilterContractDto): Promise<PaginatedContracts> {
     return this.contractsRepository.findAllPaginated({
       page: filter.page ?? 1,
       pageSize: filter.pageSize ?? 100,