feat(printer): 支持批量创建虚拟订单功能

- 修改CreateVirtualOrderRequest参数结构，将sourceId改为sourceIds列表
- 添加对sourceIds参数的空值校验
- 调用createBatchVirtualOrder方法替代原有单个订单创建逻辑
- 更新API接口支持多条source记录聚合为一笔订单

src/main/java/com/ycwl/basic/controller/pc/SourceController.java

@@ -62,9 +62,12 @@ public class SourceController {
      */
     @PostMapping("/createVirtualOrder")
     public ApiResponse<Map<String, Object>> createVirtualOrder(@RequestBody CreateVirtualOrderRequest request) {
+        if (request.getSourceIds() == null || request.getSourceIds().isEmpty()) {
+            return ApiResponse.fail("sourceIds不能为空");
+        }
         try {
-            Map<String, Object> result = printerService.createVirtualOrder(
-                    request.getSourceId(),
+            Map<String, Object> result = printerService.createBatchVirtualOrder(
+                    request.getSourceIds(),
                     request.getScenicId(),
                     request.getPrinterId(),
                     request.getNeedEnhance(),

src/main/java/com/ycwl/basic/model/printer/req/CreateVirtualOrderRequest.java

@@ -2,15 +2,17 @@ package com.ycwl.basic.model.printer.req;
 
 import lombok.Data;
 
+import java.util.List;
+
 /**
  * 创建虚拟用户0元订单请求参数
  */
 @Data
 public class CreateVirtualOrderRequest {
     /**
-     * source记录ID
+     * source记录ID列表（支持单个或多个sourceId聚合为一笔订单）
      */
-    private Long sourceId;
+    private List<Long> sourceIds;
 
     /**
      * 景区ID