fix: 修复中介导入成功条数计算错误

问题：
- 导入成功条数显示为负数
- 原因：成功数量计算使用 validRecords.size() - failures.size()
- 但没有使用实际的数据库操作返回值

修复：
- saveBatchWithUpsert 和 saveBatch 方法现在返回 int
- 累加实际的数据库影响行数
- 使用 actualSuccessCount 变量跟踪真实成功数量

影响范围：
- CcdiIntermediaryPersonImportServiceImpl
- CcdiIntermediaryEntityImportServiceImpl

doc/test-data/purchase_transaction/node_modules/duplexer2/LICENSE.md

@@ -0,0 +1,26 @@
+Copyright (c) 2013, Deoxxa Development
+======================================
+All rights reserved.
+--------------------
+  
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:  
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.  
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.  
+3. Neither the name of Deoxxa Development nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.  
+  
+THIS SOFTWARE IS PROVIDED BY DEOXXA DEVELOPMENT ''AS IS'' AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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