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

client/src/main/java/com/ecep/contract/util/ParamUtils.java

@@ -6,23 +6,15 @@ import java.util.Map;
 import java.util.Objects;
 
 public class ParamUtils {
-    public static Map<String, Object> between(LocalDate begin, LocalDate end) {
-        Map<String, Object> params = new HashMap<>();
-        params.put("begin", begin);
-        params.put("end", end);
-        return params;
+    public static Map<String, Object> between(String key, LocalDate begin, LocalDate end) {
+        return Map.of(key, Map.of(
+                "begin", begin,
+                "end", end
+        ));
     }
 
-    public static Map<String, Object> equal(String key, boolean value) {
-        Map<String, Object> params = new HashMap<>();
-        params.put(key, value);
-        return params;
-    }
-
-    public static Map<String, Object> equal(String key, String value) {
-        Map<String, Object> params = new HashMap<>();
-        params.put(key, value);
-        return params;
+    public static Map<String, Object> equal(String key, Object value) {
+        return Map.of(key, value);
     }
 
     public static Map<String, Object> like(String key, String value) {
@@ -70,7 +62,7 @@ public class ParamUtils {
         }
 
         public Builder equals(String key, Object value) {
-            params.put(key, Map.of("equals", value));
+            params.put(key, value);
             return this;
         }