feat(device): 添加MQTT设备在线状态管理与Redis容错机制

- 集成Spring Integration MQTT与Eclipse Paho客户端
- 添加设备在线状态填充逻辑，支持批量查询心跳数据
- 优化Redis配置，使用Lazy初始化与通用序列化器
- 增加Redis异常处理与防重复提交Fail-Open机制
- 新增Redis设备模块常量与在线状态VO
- 完善MQTT与Redis集群连接配置

src/main/java/com/youlai/boot/config/MqttConfig.java

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+package com.youlai.boot.config;
+
+import com.youlai.boot.config.property.MqttProperties;
+import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.integration.annotation.ServiceActivator;
+import org.springframework.integration.channel.DirectChannel;
+import org.springframework.integration.core.MessageProducer;
+import org.springframework.integration.mqtt.core.DefaultMqttPahoClientFactory;
+import org.springframework.integration.mqtt.inbound.MqttPahoMessageDrivenChannelAdapter;
+import org.springframework.integration.mqtt.outbound.MqttPahoMessageHandler;
+import org.springframework.messaging.MessageChannel;
+import org.springframework.messaging.MessageHandler;
+
+/**
+ * MQTT 配置
+ * <p>
+ * 基于 spring-integration-mqtt (Eclipse Paho) 实现消息的发布与订阅。
+ * 通过 {@code mqtt.enabled=false} 可整体关闭 MQTT 功能。
+ *
+ * @author TongTongStudio
+ * @since 2026/8/8
+ */
+@Configuration
+@ConditionalOnProperty(prefix = "mqtt", name = "enabled", havingValue = "true")
+public class MqttConfig {
+
+    /**
+     * MQTT 连接工厂
+     */
+    @Bean
+    public DefaultMqttPahoClientFactory mqttClientFactory(MqttProperties properties) {
+        MqttConnectOptions options = new MqttConnectOptions();
+        options.setServerURIs(new String[]{normalizeServerUri(properties.getUrl())});
+        if (properties.getUsername() != null && !properties.getUsername().isEmpty()) {
+            options.setUserName(properties.getUsername());
+        }
+        if (properties.getPassword() != null && !properties.getPassword().isEmpty()) {
+            options.setPassword(properties.getPassword().toCharArray());
+        }
+        options.setConnectionTimeout(properties.getConnectionTimeout());
+        options.setKeepAliveInterval(properties.getKeepAliveInterval());
+        options.setAutomaticReconnect(properties.isAutomaticReconnect());
+        options.setCleanSession(true);
+
+        DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory();
+        factory.setConnectionOptions(options);
+        return factory;
+    }
+
+    /**
+     * 将 Broker 地址统一规范为 Paho 支持的 scheme。
+     * <p>Eclipse Paho 仅内置 {@code tcp://} 与 {@code ssl://} 两种 scheme，
+     * 配置中常见的 {@code mqtt://} 需转换为 {@code tcp://}（明文）或 {@code ssl://}（加密）。</p>
+     */
+    private String normalizeServerUri(String uri) {
+        if (uri == null || uri.isEmpty()) {
+            return uri;
+        }
+        if (uri.startsWith("mqtt://")) {
+            return "tcp://" + uri.substring("mqtt://".length());
+        }
+        if (uri.startsWith("mqtts://")) {
+            return "ssl://" + uri.substring("mqtts://".length());
+        }
+        return uri;
+    }
+
+    /* ============================ 发布 (Publish) ============================ */
+
+    /**
+     * 发布消息的出站通道
+     */
+    @Bean
+    public MessageChannel mqttOutboundChannel() {
+        return new DirectChannel();
+    }
+
+    /**
+     * 发布消息处理器，通过 {@link org.springframework.messaging.support.MessageBuilder} 发送到出站通道即可发布
+     */
+    @Bean
+    @ServiceActivator(inputChannel = "mqttOutboundChannel")
+    public MessageHandler mqttOutbound(DefaultMqttPahoClientFactory factory, MqttProperties properties) {
+        MqttPahoMessageHandler handler = new MqttPahoMessageHandler(properties.getClientId() + "-pub", factory);
+        handler.setAsync(false);
+        handler.setDefaultQos(properties.getQos());
+        return handler;
+    }
+
+    /* ============================ 订阅 (Subscribe) ============================ */
+
+    /**
+     * 订阅消息的入站通道
+     */
+    @Bean
+    public MessageChannel mqttInboundChannel() {
+        return new DirectChannel();
+    }
+
+    /**
+     * 入站订阅适配器：订阅 {@link MqttProperties#getTopics()} 中配置的主题
+     */
+    @Bean
+    public MessageProducer mqttInbound(DefaultMqttPahoClientFactory factory, MqttProperties properties) {
+        String[] topics = properties.getTopics().toArray(new String[0]);
+        MqttPahoMessageDrivenChannelAdapter adapter =
+                new MqttPahoMessageDrivenChannelAdapter(
+                        properties.getClientId() + "-sub", factory, topics);
+        adapter.setCompletionTimeout(5000L);
+        adapter.setQos(properties.getQos());
+        adapter.setOutputChannel(mqttInboundChannel());
+        return adapter;
+    }
+}