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/buffers/README.markdown

@@ -0,0 +1,122 @@
+buffers
+=======
+
+Treat a collection of Buffers as a single contiguous partially mutable Buffer.
+
+Where possible, operations execute without creating a new Buffer and copying
+everything over.
+
+This is a cleaner more Buffery rehash of
+[bufferlist](http://github.com/substack/node-bufferlist).
+
+example
+=======
+
+slice
+-----
+
+    var Buffers = require('buffers');
+    var bufs = Buffers();
+    bufs.push(new Buffer([1,2,3]));
+    bufs.push(new Buffer([4,5,6,7]));
+    bufs.push(new Buffer([8,9,10]));
+    
+    console.dir(bufs.slice(2,8))
+
+output:
+
+    $ node examples/slice.js 
+    <Buffer 03 04 05 06 07 08>
+
+splice
+------
+
+    var Buffers = require('buffers');
+    var bufs = Buffers([
+        new Buffer([1,2,3]),
+        new Buffer([4,5,6,7]),
+        new Buffer([8,9,10]),
+    ]);
+    
+    var removed = bufs.splice(2, 4);
+    console.dir({
+        removed : removed.slice(),
+        bufs : bufs.slice(),
+    });
+    
+output:
+
+    $ node examples/splice.js
+    { removed: <Buffer 03 04 05 06>,
+      bufs: <Buffer 01 02 07 08 09 0a> }
+
+methods
+=======
+
+Buffers(buffers)
+----------------
+
+Create a Buffers with an array of `Buffer`s if specified, else `[]`.
+
+.push(buf1, buf2...)
+--------------------
+
+Push buffers onto the end. Just like `Array.prototype.push`.
+
+.unshift(buf1, buf2...)
+-----------------------
+
+Unshift buffers onto the head. Just like `Array.prototype.unshift`.
+
+.slice(i, j)
+------------
+
+Slice a range out of the buffer collection as if it were contiguous.
+Works just like the `Array.prototype.slice` version.
+
+.splice(i, howMany, replacements)
+---------------------------------
+
+Splice the buffer collection as if it were contiguous.
+Works just like `Array.prototype.splice`, even the replacement part!
+
+.copy(dst, dstStart, start, end)
+--------------------------------
+
+Copy the buffer collection as if it were contiguous to the `dst` Buffer with the
+specified bounds.
+Works just like `Buffer.prototype.copy`.
+
+.get(i)
+-------
+
+Get a single element at index `i`.
+
+.set(i, x)
+----------
+
+Set a single element's value at index `i`.
+
+.indexOf(needle, offset)
+----------
+
+Find a string or buffer `needle` inside the buffer collection. Returns
+the position of the search string or -1 if the search string was not
+found.
+
+Provide an `offset` to skip that number of characters at the beginning
+of the search. This can be used to find additional matches.
+
+This function will return the correct result even if the search string
+is spread out over multiple internal buffers.
+
+.toBuffer()
+-----------
+
+Convert the buffer collection to a single buffer, equivalent with `.slice(0, buffers.length)`;
+
+.toString(encoding, start, end)
+-----------
+
+Decodes and returns a string from the buffer collection.
+Works just like `Buffer.prototype.toString`