Refactor code structure for improved readability and maintainability

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

@@ -867,6 +867,27 @@ export class TrainSchedulingController {
     return res.send(buffer);
   }
 
+  @Get("schedules/:id/wagons/export")
+  @TrainSchedulingView()
+  @ApiOperation({
+    summary:
+      "Download the schedule's wagon list as an Excel workbook (one row per container: wagon, container, VGM, route, customer)",
+  })
+  async scheduleWagonListExport(
+    @Param("id", ParseUUIDPipe) id: string,
+    @Res() res: Response,
+  ) {
+    const { filename, buffer } =
+      await this.trainSchedulingService.scheduleWagonListWorkbook(id);
+    res.setHeader(
+      "Content-Type",
+      "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+    );
+    res.setHeader("Content-Disposition", `attachment; filename="${filename}"`);
+    res.setHeader("Content-Length", buffer.length);
+    return res.send(buffer);
+  }
+
   @Get("schedules/:id/export/load-list/document")
   @TrainSchedulingView()
   @ApiOperation({ summary: "Download printable export marshalling / load list PDF" })