feat: 수주 관리 Phase 3 - 고급 기능 API 구현

- 견적→수주 변환 API (POST /orders/from-quote/{quoteId})
- 생산지시 생성 API (POST /orders/{id}/production-order)
- FormRequest 검증 클래스 추가
- 중복 생성 방지 및 상태 검증 로직

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

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

@@ -4,6 +4,8 @@
 
 use App\Helpers\ApiResponse;
 use App\Http\Controllers\Controller;
+use App\Http\Requests\Order\CreateFromQuoteRequest;
+use App\Http\Requests\Order\CreateProductionOrderRequest;
 use App\Http\Requests\Order\StoreOrderRequest;
 use App\Http\Requests\Order\UpdateOrderRequest;
 use App\Http\Requests\Order\UpdateOrderStatusRequest;
@@ -85,4 +87,24 @@ public function updateStatus(UpdateOrderStatusRequest $request, int $id)
             return $this->service->updateStatus($id, $request->validated()['status']);
         }, __('message.order.status_updated'));
     }
+
+    /**
+     * 견적에서 수주 생성
+     */
+    public function createFromQuote(CreateFromQuoteRequest $request, int $quoteId)
+    {
+        return ApiResponse::handle(function () use ($request, $quoteId) {
+            return $this->service->createFromQuote($quoteId, $request->validated());
+        }, __('message.order.created_from_quote'));
+    }
+
+    /**
+     * 생산지시 생성
+     */
+    public function createProductionOrder(CreateProductionOrderRequest $request, int $id)
+    {
+        return ApiResponse::handle(function () use ($request, $id) {
+            return $this->service->createProductionOrder($id, $request->validated());
+        }, __('message.order.production_order_created'));
+    }
 }