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/service/WebSocketService.java

@@ -10,7 +10,7 @@ import org.springframework.web.socket.TextMessage;
 import org.springframework.web.socket.WebSocketSession;
 
 import com.ecep.contract.handler.MessageNotitfication;
-import com.ecep.contract.handler.WebSocketHandler;
+import com.ecep.contract.handler.WebSocketServerHandler;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
 /**
@@ -21,11 +21,11 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 public class WebSocketService {
 
     private static final Logger logger = Logger.getLogger(WebSocketService.class.getName());
-    private final WebSocketHandler webSocketHandler;
+    private final WebSocketServerHandler webSocketHandler;
     @Autowired
     private ObjectMapper objectMapper;
 
-    public WebSocketService(WebSocketHandler webSocketHandler) {
+    public WebSocketService(WebSocketServerHandler webSocketHandler) {
         this.webSocketHandler = webSocketHandler;
     }