refactor: 重构WebSocket服务及相关实体类

重构WebSocket服务名称从WebSocketService改为WebSocketClientService，并实现Serializable接口
添加WebSocket常量定义和消息处理实现
优化实体类equals和hashCode方法
修复控制器路径和日志配置
添加查询服务和任务接口方法

server/src/main/java/com/ecep/contract/config/WebSocketConfig.java

@@ -9,7 +9,7 @@ import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
 import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;
 import org.springframework.web.socket.server.support.HttpSessionHandshakeInterceptor;
 
-import com.ecep.contract.handler.WebSocketHandler;
+import com.ecep.contract.handler.WebSocketServerHandler;
 
 /**
  * WebSocket配置类
@@ -19,10 +19,10 @@ import com.ecep.contract.handler.WebSocketHandler;
 @EnableWebSocket
 public class WebSocketConfig implements WebSocketConfigurer {
 
-    private final WebSocketHandler webSocketHandler;
+    private final WebSocketServerHandler webSocketHandler;
 
     @Autowired
-    public WebSocketConfig(WebSocketHandler webSocketHandler) {
+    public WebSocketConfig(WebSocketServerHandler webSocketHandler) {
         this.webSocketHandler = webSocketHandler;
     }