feat(xispeak): 新增Excel校验接口，只校验不保存到数据库

- JeecgController 新增 checkExcelByEasyExcel 基类方法，batchHandler 传 null 跳过入库
- ExcelImportListener 支持 batchHandler 为 null 时不攒 batch 内存
- BgXiSpeakController 新增 /checkExcelByEasyExcel 接口

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

jeecg-module-supervision/src/main/java/org/jeecg/modules/bg/xispeak/controller/BgXiSpeakController.java

@@ -382,6 +382,14 @@ public class BgXiSpeakController extends JeecgController<BgXiSpeak, IBgXiSpeakSe
         return super.importExcelByEasyExcel(request, BgXiSpeak.class);
     }
 
+    /**
+     * 通过EasyExcel校验数据，只返回校验结果，不保存到数据库
+     */
+    @RequiresPermissions("bg.xispeak:bg_xi_speak:importExcel")
+    @RequestMapping(value = "/checkExcelByEasyExcel", method = RequestMethod.POST)
+    public Result<?> checkExcelByEasyExcel(HttpServletRequest request) {
+        return super.checkExcelByEasyExcel(request, BgXiSpeak.class);
+    }
 
 
     /**