feat: [material] 부적합관리 API Phase 1-A 구현

- Migration: nonconforming_reports, nonconforming_report_items 테이블
- Model: NonconformingReport, NonconformingReportItem (관계, cast, scope)
- FormRequest: Store/Update 검증 (items 배열 포함)
- Service: CRUD + 채번(NC-YYYYMMDD-NNN) + 비용 자동 계산 + 상태 전이
- Controller: REST 7개 엔드포인트 (목록/통계/상세/등록/수정/삭제/상태변경)
- Route: /api/v1/material/nonconforming-reports
- i18n: 부적합관리 에러 메시지 (ko)

app/Http/Requests/Material/UpdateNonconformingReportRequest.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace App\Http\Requests\Material;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class UpdateNonconformingReportRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'nc_type' => 'sometimes|string|in:material,process,construction,other',
+            'occurred_at' => 'sometimes|date',
+            'confirmed_at' => 'nullable|date',
+            'site_name' => 'nullable|string|max:100',
+            'department_id' => 'nullable|integer|exists:departments,id',
+            'order_id' => 'nullable|integer|exists:orders,id',
+            'item_id' => 'nullable|integer|exists:items,id',
+            'defect_quantity' => 'nullable|numeric|min:0',
+            'unit' => 'nullable|string|max:20',
+            'defect_description' => 'nullable|string',
+            'cause_analysis' => 'nullable|string',
+            'corrective_action' => 'nullable|string',
+            'action_completed_at' => 'nullable|date',
+            'action_manager_id' => 'nullable|integer',
+            'related_employee_id' => 'nullable|integer',
+            'material_cost' => 'nullable|integer|min:0',
+            'shipping_cost' => 'nullable|integer|min:0',
+            'construction_cost' => 'nullable|integer|min:0',
+            'other_cost' => 'nullable|integer|min:0',
+            'remarks' => 'nullable|string',
+            'drawing_location' => 'nullable|string|max:255',
+            'status' => 'sometimes|string|in:RECEIVED,ANALYZING,RESOLVED,CLOSED',
+
+            // 자재 상세 내역
+            'items' => 'nullable|array',
+            'items.*.id' => 'nullable|integer',
+            'items.*.item_id' => 'nullable|integer',
+            'items.*.item_name' => 'required_with:items|string|max:100',
+            'items.*.specification' => 'nullable|string|max:100',
+            'items.*.quantity' => 'nullable|numeric|min:0',
+            'items.*.unit_price' => 'nullable|integer|min:0',
+            'items.*.remarks' => 'nullable|string|max:255',
+        ];
+    }
+}