feat: implement consolidation approval process for shared-wagon bookings

- Add migration for consolidation approvals table and status enum
- Create ConsolidationApprovalService to handle approval logic
- Implement repository for managing consolidation approvals
- Add entity for consolidation approval with necessary fields
- Develop frontend components for displaying and managing consolidation approvals
- Create tests for consolidation approval service to ensure correct behavior

apps/edr-freight-web/backoffice/src/components/trainScheduling/TrainCompositionDiagram.tsx

@@ -1,4 +1,4 @@
-import { useMemo } from "react";
+import { memo, useMemo } from "react";
 import { Box, Group, Paper, Progress, Stack, Text, Tooltip } from "@mantine/core";
 import { useElementSize } from "@mantine/hooks";
 import { Box as BoxIcon, Container as ContainerIcon, Fuel, Gauge, TrainFront } from "lucide-react";
@@ -132,7 +132,7 @@ function Coupler() {
   );
 }
 
-function LocomotiveCar({
+const LocomotiveCar = memo(function LocomotiveCar({
   code,
   name,
   maxPullWeightTons,
@@ -260,7 +260,7 @@ function LocomotiveCar({
       </Box>
     </Tooltip>
   );
-}
+});
 
 const CONTAINER_GRADIENTS = [
   "linear-gradient(180deg, var(--mantine-color-cyan-5), var(--mantine-color-cyan-7))",
@@ -271,7 +271,7 @@ const CONTAINER_BORDERS = [
   "var(--mantine-color-blue-8)",
 ];
 
-function WagonCar({ wagon }: { wagon: NormalizedWagon }) {
+const WagonCar = memo(function WagonCar({ wagon }: { wagon: NormalizedWagon }) {
   // GROSS on both sides: cargo + tare vs rated payload + tare.
   const grossTons = round1(wagon.assignedWeightTons + wagon.tareWeightTons);
   const maxGrossTons = round1(wagon.capacityTons + wagon.tareWeightTons);
@@ -468,7 +468,7 @@ function WagonCar({ wagon }: { wagon: NormalizedWagon }) {
       </Box>
     </Tooltip>
   );
-}
+});
 
 /** Railway track: two rails over evenly-spaced sleepers. */
 function TrackBed() {
@@ -520,7 +520,7 @@ function TrackBed() {
   );
 }
 
-export function TrainCompositionDiagram({
+export const TrainCompositionDiagram = memo(function TrainCompositionDiagram({
   locomotive,
   locomotives,
   wagons,
@@ -818,7 +818,7 @@ export function TrainCompositionDiagram({
       </Stack>
     </Paper>
   );
-}
+});
 
 function LegendDot({ color, label }: { color: string; label: string }) {
   return (