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/modules/train-scheduling/controllers/train-scheduling.controller.ts

@@ -15,6 +15,7 @@ import {
   PortalCustomer,
   TrainSchedulingCancel,
   TrainSchedulingCreate,
+  TrainSchedulingEditTrainNumber,
   TrainSchedulingReschedule,
   TrainSchedulingRulesManage,
   TrainSchedulingUpdate,
@@ -52,6 +53,8 @@ import { AvailableDaysForCargoQueryDto } from "../dto/available-days-for-cargo-q
 import { UpdateTrainSchedulingGlobalRulesDto } from "../dto/update-train-scheduling-global-rules.dto";
 import { UpdateScheduleWindowRuleDto } from "../dto/update-schedule-window-rule.dto";
 import { UpdateScheduleDateDto } from "../dto/update-schedule-date.dto";
+import { MergeScheduleTrainDto } from "../dto/merge-schedule-train.dto";
+import { UpdateScheduleTrainNumberDto } from "../dto/update-schedule-train-number.dto";
 import { MaintenanceRescheduleDto } from "../dto/maintenance-reschedule.dto";
 import { TrainSchedulingService } from "../services/train-scheduling.service";
 import { BookingBatchService } from "../booking-batch.service";
@@ -795,6 +798,47 @@ export class TrainSchedulingController {
     return this.trainSchedulingService.getContainerTrainScheduleById(id);
   }
 
+  @Patch("schedules/:id/train-number")
+  @TrainSchedulingEditTrainNumber()
+  @ApiOperation({
+    summary:
+      "Edit a departure's train number and voyage number — allowed only until the train is dispatched",
+  })
+  async updateScheduleTrainNumber(
+    @Param("id", ParseUUIDPipe) id: string,
+    @Body() dto: UpdateScheduleTrainNumberDto,
+  ) {
+    await this.trainSchedulingService.updateScheduleTrainNumber(id, dto);
+    return this.trainSchedulingService.getContainerTrainScheduleById(id);
+  }
+
+  @Get("schedules/:id/merge-preview/:targetTrainId")
+  @TrainSchedulingUpdate()
+  @ApiOperation({
+    summary:
+      "What merging a train into this schedule would do — affected schedules, wagon totals and any blocking reasons. Read-only.",
+  })
+  async previewScheduleMerge(
+    @Param("id", ParseUUIDPipe) id: string,
+    @Param("targetTrainId", ParseUUIDPipe) targetTrainId: string,
+  ) {
+    return this.trainSchedulingService.previewMerge(id, targetTrainId);
+  }
+
+  @Post("schedules/:id/merge")
+  @TrainSchedulingUpdate()
+  @ApiOperation({
+    summary:
+      "Merge another train into this schedule: its wagons join this consist, a same-day schedule on it is absorbed, and the emptied train is deactivated",
+  })
+  async mergeScheduleTrain(
+    @Param("id", ParseUUIDPipe) id: string,
+    @Body() dto: MergeScheduleTrainDto,
+  ) {
+    await this.trainSchedulingService.mergeScheduleTrain(id, dto);
+    return this.trainSchedulingService.getContainerTrainScheduleById(id);
+  }
+
   @Post("schedules/:id/maintenance")
   @TrainSchedulingReschedule()
   @ApiOperation({