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/big-integer/bower.json

@@ -0,0 +1,29 @@
+{
+  "name": "big-integer",
+  "description": "An arbitrary length integer library for Javascript",
+  "main": "./BigInteger.js",
+  "authors": [
+    "Peter Olson"
+  ],
+  "license": "Unlicense",
+  "keywords": [
+    "math",
+    "big",
+    "bignum",
+    "bigint",
+    "biginteger",
+    "integer",
+    "arbitrary",
+    "precision",
+    "arithmetic"
+  ],
+  "homepage": "https://github.com/peterolson/BigInteger.js",
+  "ignore": [
+    "**/.*",
+    "node_modules",
+    "bower_components",
+    "test",
+    "coverage",
+    "tests"
+  ]
+}