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/package.json

@@ -0,0 +1,34 @@
+{
+  "name": "buffer-indexof-polyfill",
+  "version": "1.0.2",
+  "description": "This is a polyfill for Buffer#indexOf introduced in NodeJS 4.0.",
+  "main": "index.js",
+  "scripts": {
+    "test": "mocha",
+    "lint": "eslint .",
+    "fix": "eslint . --fix"
+  },
+  "author": "https://github.com/sarosia",
+  "license": "MIT",
+  "engines": {
+    "node": ">=0.10"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/sarosia/buffer-indexof-polyfill.git"
+  },
+  "devDependencies": {
+    "chai": "^3.3.0",
+    "eslint": "^1.10.3",
+    "mocha": "^2.3.3"
+  },
+  "keywords": [
+    "buffer",
+    "indexof",
+    "polyfill"
+  ],
+  "bugs": {
+    "url": "https://github.com/sarosia/buffer-indexof-polyfill/issues"
+  },
+  "homepage": "https://github.com/sarosia/buffer-indexof-polyfill#readme"
+}