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

src/loggerService.js

@@ -0,0 +1,50 @@
+const db = require('./db');
+
+const logHostResult = async (data) => {
+    const query = `
+        INSERT INTO upgrade_log (
+            uuid, start_time, roomtype_id, host_str, filename, status, 
+            end_time, file_type, config_version, firmware_version
+        ) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)
+    `;
+    const values = [
+        data.uuid,
+        data.start_time,
+        data.roomtype_id,
+        data.host_str,
+        data.filename,
+        data.status,
+        data.end_time,
+        data.file_type,
+        data.config_version,
+        data.firmware_version
+    ];
+    await db.query(query, values);
+};
+
+const getUpgradeState = async (key) => {
+    const res = await db.query('SELECT * FROM upgrade_state WHERE state_key = $1', [key]);
+    if (res.rows.length > 0) {
+        return res.rows[0];
+    }
+    return null;
+};
+
+const updateUpgradeState = async (key, currentRoomtypeIndex, executionCount) => {
+    const query = `
+        INSERT INTO upgrade_state (state_key, current_roomtype_index, execution_count, last_updated)
+        VALUES ($1, $2, $3, NOW())
+        ON CONFLICT (state_key) 
+        DO UPDATE SET 
+            current_roomtype_index = EXCLUDED.current_roomtype_index,
+            execution_count = EXCLUDED.execution_count,
+            last_updated = NOW();
+    `;
+    await db.query(query, [key, currentRoomtypeIndex, executionCount]);
+};
+
+module.exports = {
+    logHostResult,
+    getUpgradeState,
+    updateUpgradeState
+};