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-web/backoffice/src/services/api.ts

@@ -67,6 +67,7 @@ import type {
   PinWagonsPayload,
   RecordCheckpointPayload,
   StaffBookingWindow,
+  ScheduleMergePreview,
   TrainScheduleDetail,
   TrainScheduleFilters,
   TrainScheduleListFilters,
@@ -596,6 +597,36 @@ export const api = {
       () => TRAIN_SCHEDULING_INVALIDATIONS,
     ),
 
+    previewScheduleMerge: endpoint<
+      { id: string; targetTrainId: string },
+      ScheduleMergePreview
+    >(
+      "train-scheduling",
+      "merge-preview",
+      ({ id, targetTrainId }) =>
+        trainSchedulingService.previewScheduleMerge(id, targetTrainId),
+      ({ id, targetTrainId }) => [
+        "train-scheduling",
+        "merge-preview",
+        id,
+        targetTrainId,
+      ],
+    ),
+
+    mergeScheduleTrain: endpoint<
+      { id: string; targetTrainId: string; reason?: string },
+      TrainScheduleDetail
+    >(
+      "train-scheduling",
+      "merge-train",
+      ({ id, ...payload }) =>
+        trainSchedulingService.mergeScheduleTrain(id, payload),
+      undefined,
+      // Wagons and bookings move between trains and schedules, so the wagon and
+      // train caches are stale too — not just the scheduling ones.
+      () => [...TRAIN_SCHEDULING_INVALIDATIONS, ["wagons"], ["trains"]],
+    ),
+
     markBookingPaid: endpoint<string, void>(
       "train-scheduling",
       "mark-booking-paid",
@@ -2040,11 +2071,14 @@ export const api = {
       () => TRAIN_BUILDER_INVALIDATIONS,
     ),
 
-    sendWagonToMaintenance: endpoint<{ id: string; wagonId: string }, TrainComposition>(
+    sendWagonToMaintenance: endpoint<
+      { id: string; wagonId: string; note?: string },
+      TrainComposition
+    >(
       "train-builder",
       "sendWagonToMaintenance",
-      ({ id, wagonId }) =>
-        trainBuilderService.sendWagonToMaintenance(id, wagonId).then((r) => r.data),
+      ({ id, wagonId, note }) =>
+        trainBuilderService.sendWagonToMaintenance(id, wagonId, note).then((r) => r.data),
       undefined,
       () => TRAIN_BUILDER_INVALIDATIONS,
     ),