feat: [HR/기타] 캘린더/배차/설비/재고 + DB 마이그레이션

- 캘린더 CRUD API, 배차차량 관리 API (CRUD + options)
- 배차정보 다중 행 시스템 (shipment_vehicle_dispatches)
- 설비 다중점검주기 + 부 담당자 스키마 추가
- TodayIssue 날짜 기반 조회, Stock/Client 날짜 필터
- i18n 메시지 추가

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Http/Controllers/Api/V1/VehicleDispatchController.php

@@ -0,0 +1,74 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1;
+
+use App\Helpers\ApiResponse;
+use App\Http\Controllers\Controller;
+use App\Http\Requests\VehicleDispatch\VehicleDispatchUpdateRequest;
+use App\Services\VehicleDispatchService;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class VehicleDispatchController extends Controller
+{
+    public function __construct(
+        private readonly VehicleDispatchService $service
+    ) {}
+
+    /**
+     * 배차차량 목록 조회
+     */
+    public function index(Request $request): JsonResponse
+    {
+        $params = $request->only([
+            'search',
+            'status',
+            'start_date',
+            'end_date',
+            'per_page',
+            'page',
+        ]);
+
+        $dispatches = $this->service->index($params);
+
+        return ApiResponse::success($dispatches, __('message.fetched'));
+    }
+
+    /**
+     * 배차차량 통계 조회
+     */
+    public function stats(): JsonResponse
+    {
+        $stats = $this->service->stats();
+
+        return ApiResponse::success($stats, __('message.fetched'));
+    }
+
+    /**
+     * 배차차량 상세 조회
+     */
+    public function show(int $id): JsonResponse
+    {
+        try {
+            $dispatch = $this->service->show($id);
+
+            return ApiResponse::success($dispatch, __('message.fetched'));
+        } catch (\Illuminate\Database\Eloquent\ModelNotFoundException $e) {
+            return ApiResponse::error(__('error.not_found'), 404);
+        }
+    }
+
+    /**
+     * 배차차량 수정
+     */
+    public function update(VehicleDispatchUpdateRequest $request, int $id): JsonResponse
+    {
+        try {
+            $dispatch = $this->service->update($id, $request->validated());
+
+            return ApiResponse::success($dispatch, __('message.updated'));
+        } catch (\Illuminate\Database\Eloquent\ModelNotFoundException $e) {
+            return ApiResponse::error(__('error.not_found'), 404);
+        }
+    }
+}