feat(train): enhance train history and scheduling features

- Added a reason field to train history entries for detach/maintenance actions.
- Updated TrainHistoryPanel to display the reason for wagon detachments.
- Introduced per-wagon load/unload functionality in ScheduleWorkspacePanel with a modal for managing individual wagons.
- Implemented API endpoints for loading and unloading specific wagons, including the ability to cancel remaining wagons with a reason.
- Refactored detach request handling in TrainBuilderDetailPage to streamline the process and remove the approval flow, requiring a reason for detachments.
- Updated types and services to support new wagon loading/unloading features and booking wagon retrieval.

apps/edr-freight-web/backoffice/src/constants/URLS.ts

@@ -491,6 +491,13 @@ export const URL_CONSTANTS = {
       `/train-scheduling/schedules/${id}/bookings/${bookingId}/load`,
     BOOKING_UNLOAD: (id: string, bookingId: string) =>
       `/train-scheduling/schedules/${id}/bookings/${bookingId}/unload`,
+    BOOKING_WAGON_LOAD: (id: string, bookingId: string, allocationId: string) =>
+      `/train-scheduling/schedules/${id}/bookings/${bookingId}/wagons/${allocationId}/load`,
+    BOOKING_WAGON_UNLOAD: (id: string, bookingId: string, allocationId: string) =>
+      `/train-scheduling/schedules/${id}/bookings/${bookingId}/wagons/${allocationId}/unload`,
+    BOOKING_WAGONS: (bookingId: string) => `/bookings/${bookingId}/wagons`,
+    CANCEL_REMAINING_WAGONS: (bookingId: string) =>
+      `/bookings/${bookingId}/wagon-cancellations/at-loading`,
     INTERCITY_BOOKINGS: "/train-scheduling/intercity/bookings",
     INTERCITY_CANDIDATES: (id: string) =>
       `/train-scheduling/schedules/${id}/intercity-candidates`,