feat(train-scheduling): dedicated load/unload permissions

Carves cargo load/unload confirmation out of the coarse
trainScheduling.update permission into its own guard
(TrainSchedulingLoad/TrainSchedulingUnload), covering import, export,
and intercity — the generic per-booking route already serves all
directions, and the intercity-specific route gets the same two keys.
Adds the catalog entries and grants them to operationsOfficer/director
alongside the existing .update grant so current access is unchanged.

apps/edr-freight-api/src/modules/train-scheduling/controllers/train-scheduling.controller.ts

@@ -16,7 +16,9 @@ import {
   TrainSchedulingCancel,
   TrainSchedulingCreate,
   TrainSchedulingEditTrainNumber,
+  TrainSchedulingLoad,
   TrainSchedulingReschedule,
+  TrainSchedulingUnload,
   TrainSchedulingRulesManage,
   TrainSchedulingUpdate,
   TrainSchedulingView,
@@ -598,7 +600,7 @@ export class TrainSchedulingController {
   }
 
   @Post("schedules/:id/bookings/:bookingId/load")
-  @TrainSchedulingUpdate()
+  @TrainSchedulingLoad()
   @ApiOperation({
     summary:
       "Confirm a booking's cargo loaded at its origin yard (any direction; train must be at that yard)",
@@ -611,7 +613,7 @@ export class TrainSchedulingController {
   }
 
   @Post("schedules/:id/bookings/:bookingId/unload")
-  @TrainSchedulingUpdate()
+  @TrainSchedulingUnload()
   @ApiOperation({
     summary:
       "Confirm a booking's cargo unloaded at its destination yard — per-booking arrival, may precede the train's final arrival",
@@ -624,7 +626,7 @@ export class TrainSchedulingController {
   }
 
   @Post("schedules/:id/intercity/:bookingId/load")
-  @TrainSchedulingUpdate()
+  @TrainSchedulingLoad()
   @ApiOperation({
     summary: "Confirm intercity cargo loaded (train must be at the booking's origin yard)",
   })
@@ -636,7 +638,7 @@ export class TrainSchedulingController {
   }
 
   @Post("schedules/:id/intercity/:bookingId/unload")
-  @TrainSchedulingUpdate()
+  @TrainSchedulingUnload()
   @ApiOperation({
     summary:
       "Confirm intercity cargo unloaded at the booking's destination yard (completes the booking)",