feat: ItemMaster Phase 2 API 구현 (확장 기능 11개 엔드포인트)

- Controller 3개, Service 3개, FormRequest 6개 생성
- Routes 등록 (BOM 항목, 섹션 템플릿, 마스터 필드)
- Service-First, Multi-tenant, Soft Delete
- 라우트 테스트 및 Pint 검사 통과

13 files changed, 600+ insertions(+)

app/Http/Requests/ItemMaster/ItemMasterFieldUpdateRequest.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Http\Requests\ItemMaster;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class ItemMasterFieldUpdateRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'field_name' => 'sometimes|string|max:255',
+            'field_type' => 'sometimes|in:textbox,number,dropdown,checkbox,date,textarea',
+            'category' => 'sometimes|nullable|string|max:100',
+            'description' => 'sometimes|nullable|string',
+            'is_common' => 'sometimes|nullable|boolean',
+            'default_value' => 'sometimes|nullable|string',
+            'options' => 'sometimes|nullable|array',
+            'validation_rules' => 'sometimes|nullable|array',
+            'properties' => 'sometimes|nullable|array',
+        ];
+    }
+}