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/fstream/lib/socket-reader.js

@@ -0,0 +1,36 @@
+// Just get the stats, and then don't do anything.
+// You can't really "read" from a socket.  You "connect" to it.
+// Mostly, this is here so that reading a dir with a socket in it
+// doesn't blow up.
+
+module.exports = SocketReader
+
+var inherits = require('inherits')
+var Reader = require('./reader.js')
+
+inherits(SocketReader, Reader)
+
+function SocketReader (props) {
+  var self = this
+  if (!(self instanceof SocketReader)) {
+    throw new Error('SocketReader must be called as constructor.')
+  }
+
+  if (!(props.type === 'Socket' && props.Socket)) {
+    throw new Error('Non-socket type ' + props.type)
+  }
+
+  Reader.call(self, props)
+}
+
+SocketReader.prototype._read = function () {
+  var self = this
+  if (self._paused) return
+  // basically just a no-op, since we got all the info we have
+  // from the _stat method
+  if (!self._ended) {
+    self.emit('end')
+    self.emit('close')
+    self._ended = true
+  }
+}