feat: 添加Paho MQTT v5客户端依赖

为WVP平台引入MQTT协议支持，用于向边缘端推送AI配置

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pom.xml

@@ -410,6 +410,13 @@
             <artifactId>commons-pool2</artifactId>
         </dependency>
 
+        <!-- MQTT v5 客户端 -->
+        <dependency>
+            <groupId>org.eclipse.paho</groupId>
+            <artifactId>org.eclipse.paho.mqttv5.client</artifactId>
+            <version>1.2.5</version>
+        </dependency>
+
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>