feat(mq): 实现 websopy 端 RabbitMQ 消费者功能

- 新增 SyncMessage.java 定义 websopy 端消息实体，复用 server-api 格式
- 新增 RabbitMQConfig.java 配置交换机、队列及死信队列
- 新增 SyncMessageConsumer.java 实现 USER_SYNC 消息监听与处理
- 修改 pom.xml，添加 spring-boot-starter-amqp 依赖
- 修改 application.yml，添加 RabbitMQ 连接配置和开关
- 优化消息生产者 RabbitMQSyncProducer 代码，移除多余注解
- 设计 server-api -> RabbitMQ -> websopy-java -> AppUserCacheService 流程接口

src/main/java/com/gxwebsoft/common/mq/producer/impl/RabbitMQSyncProducer.java

@@ -13,7 +13,7 @@ import org.springframework.amqp.support.converter.MessageConverter;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.stereotype.Component;
 
-import javax.annotation.Autowired;
+
 import java.util.HashMap;
 import java.util.Map;
 
@@ -29,7 +29,6 @@ public class RabbitMQSyncProducer implements SyncMessageProducer, RabbitTemplate
     private final MessageConverter messageConverter;
     private final ObjectMapper objectMapper;
 
-    @Autowired
     public RabbitMQSyncProducer(RabbitTemplate rabbitTemplate, MessageConverter messageConverter, ObjectMapper objectMapper) {
         this.rabbitTemplate = rabbitTemplate;
         this.messageConverter = messageConverter;