add Group 9 delivery scenarios for self-haul and last-mile paths

- Implemented G9·S38 tests for customer self-haul truck assignments, ensuring compliance with container limits and truck assignments.
- Added G9·S39 tests for last-mile delivery, self-haul, and yard pickup, verifying independent paths for multiple bookings on the same train.
- Created seed data for Group 1 and Group 2 scenarios, ensuring proper setup for weight and capacity tests.
- Updated booking interface to deprecate  in favor of  for better clarity in allocations.

apps/edr-freight-web/portal/src/services/bookings.service.ts

@@ -172,6 +172,8 @@ export interface BookingListFilter {
   status?: string;
   /** Comma-separated statuses (overrides `status` when set). */
   statuses?: string;
+  /** 'true' = has a train assigned (allocated), 'false' = not yet assigned. */
+  assignedToSchedule?: "true" | "false";
   /** ONE_TIME or GENERAL_CONTRACT. */
   bookingType?: string;
   /** CONTAINER or BULK. */