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

scripts/init_db.js

@@ -0,0 +1,45 @@
+require('dotenv').config();
+const { Client } = require('pg');
+const fs = require('fs');
+const path = require('path');
+
+const getDbConfig = (database) => ({
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT,
+    user: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database
+});
+
+const ensureDatabase = async () => {
+    const adminClient = new Client(getDbConfig('postgres'));
+    await adminClient.connect();
+    const dbName = process.env.DB_NAME;
+    const exists = await adminClient.query('SELECT 1 FROM pg_database WHERE datname = $1', [dbName]);
+    if (exists.rowCount === 0) {
+        await adminClient.query(`CREATE DATABASE ${dbName}`);
+    }
+    await adminClient.end();
+};
+
+const ensureSchema = async () => {
+    const dbClient = new Client(getDbConfig(process.env.DB_NAME));
+    await dbClient.connect();
+    const sqlPath = path.join(__dirname, 'init_db.sql');
+    const sql = fs.readFileSync(sqlPath, 'utf8');
+    await dbClient.query(sql);
+    await dbClient.end();
+};
+
+const run = async () => {
+    try {
+        await ensureDatabase();
+        await ensureSchema();
+        console.log('Database initialization complete.');
+    } catch (err) {
+        console.error('Database initialization failed:', err.message);
+        process.exit(1);
+    }
+};
+
+run();