feat:FQC 제품검사 문서 일괄생성 API 추가

- POST /v1/documents/bulk-create-fqc: 수주 개소별 제품검사 문서 일괄생성
- GET /v1/documents/fqc-status: 수주별 FQC 진행현황 조회
- BulkCreateFqcRequest FormRequest 추가
- error.php에 no_order_items, already_created 메시지 추가

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

app/Http/Requests/Document/BulkCreateFqcRequest.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Http\Requests\Document;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class BulkCreateFqcRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'template_id' => 'required|integer|exists:document_templates,id',
+            'order_id' => 'required|integer|exists:orders,id',
+        ];
+    }
+
+    public function messages(): array
+    {
+        return [
+            'template_id.required' => __('validation.required', ['attribute' => '템플릿']),
+            'template_id.exists' => __('validation.exists', ['attribute' => '템플릿']),
+            'order_id.required' => __('validation.required', ['attribute' => '수주']),
+            'order_id.exists' => __('validation.exists', ['attribute' => '수주']),
+        ];
+    }
+}