feat: 实现RCU固件升级服务核心功能

- 添加升级服务主逻辑，包括定时触发升级、状态查询和日志记录
- 实现数据库初始化脚本和日志表结构
- 添加PM2部署配置文件
- 实现环境变量配置系统
- 添加API客户端模块处理外部接口调用
- 实现升级状态轮询和超时处理机制
- 添加测试用例验证核心功能

package.json

@@ -0,0 +1,28 @@
+{
+  "name": "upload_rcu_dev",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "jest",
+    "spec:validate": "openspec validate --specs --no-interactive",
+    "dev": "node src/index.js",
+    "start": "node src/index.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "commonjs",
+  "dependencies": {
+    "axios": "^1.13.2",
+    "dotenv": "^17.2.3",
+    "node-cron": "^4.2.1",
+    "pg": "^8.17.1",
+    "uuid": "^13.0.0"
+  },
+  "devDependencies": {
+    "@fission-ai/openspec": "^0.22.0",
+    "eslint": "^9.39.2",
+    "jest": "^30.2.0"
+  }
+}