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/buffer-indexof-polyfill/index.js

@@ -0,0 +1,73 @@
+"use strict";
+var initBuffer = require("./init-buffer");
+
+if (!Buffer.prototype.indexOf) {
+    Buffer.prototype.indexOf = function (value, offset) {
+        offset = offset || 0;
+
+        // Always wrap the input as a Buffer so that this method will support any
+        // data type such as array octet, string or buffer.
+        if (typeof value === "string" || value instanceof String) {
+            value = initBuffer(value);
+        } else if (typeof value === "number" || value instanceof Number) {
+            value = initBuffer([ value ]);
+        }
+
+        var len = value.length;
+
+        for (var i = offset; i <= this.length - len; i++) {
+            var mismatch = false;
+            for (var j = 0; j < len; j++) {
+                if (this[i + j] != value[j]) {
+                    mismatch = true;
+                    break;
+                }
+            }
+
+            if (!mismatch) {
+                return i;
+            }
+        }
+
+        return -1;
+    };
+}
+
+function bufferLastIndexOf (value, offset) {
+
+    // Always wrap the input as a Buffer so that this method will support any
+    // data type such as array octet, string or buffer.
+    if (typeof value === "string" || value instanceof String) {
+        value = initBuffer(value);
+    } else if (typeof value === "number" || value instanceof Number) {
+        value = initBuffer([ value ]);
+    }
+
+    var len = value.length;
+    offset = offset || this.length - len;
+
+    for (var i = offset; i >= 0; i--) {
+        var mismatch = false;
+        for (var j = 0; j < len; j++) {
+            if (this[i + j] != value[j]) {
+                mismatch = true;
+                break;
+            }
+        }
+
+        if (!mismatch) {
+            return i;
+        }
+    }
+
+    return -1;
+}
+
+
+if (Buffer.prototype.lastIndexOf) {
+    // check Buffer#lastIndexOf is usable: https://github.com/nodejs/node/issues/4604
+    if (initBuffer("ABC").lastIndexOf ("ABC") === -1)
+        Buffer.prototype.lastIndexOf = bufferLastIndexOf;
+} else {
+    Buffer.prototype.lastIndexOf = bufferLastIndexOf;
+}