fix: [수주서] ProductRow 타입에 product_code 속성 추가

빌드 타입 에러 해결

src/components/orders/documents/SalesOrderDocument.tsx

@@ -47,6 +47,7 @@ interface ProductRow {
   floor?: string;
   symbol?: string;
   product_name?: string;
+  product_code?: string;
   product_type?: string;
   open_width?: number | string;
   open_height?: number | string;