feat: add wagon usage computation and maintenance logging features

- Implemented  utility to calculate wagon usage metrics for train schedules.
- Created  for sending wagons to maintenance with optional notes.
- Added unit tests for train builder maintenance functionalities, including formatting train run labels and building maintenance notes.
- Developed  component for merging train schedules with detailed previews and reasons for merging.
- Introduced  component for selecting wagons with search functionality and selection limits.
- Created  for displaying and filtering audit logs, including detailed views of individual log entries.
- Added  for handling API interactions related to audit logs, including fetching logs and entity types.

apps/edr-freight-api/src/common/booking-guards.ts

@@ -90,6 +90,10 @@ export const TrainSchedulingReschedule = () =>
 export const TrainSchedulingRulesManage = () =>
   BookingStaff(FREIGHT_PERMS.trainScheduling.rulesManage);
 
+/** Edit a schedule's operational run numbers (train + voyage) before dispatch. */
+export const TrainSchedulingEditTrainNumber = () =>
+  BookingStaff(FREIGHT_PERMS.trainScheduling.editTrainNumber);
+
 /**
  * Fleet guards take an optional granular per-resource key (locomotives:create,
  * wagons:delete, …). The legacy coarse fleet:view / fleet:manage keys remain