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/service/CompanyInvoiceInfoService.java

@@ -1,19 +1,23 @@
-package com.ecep.contract.controller.project;
-
-import java.util.List;
+package com.ecep.contract.service;
 
 import com.ecep.contract.model.Company;
 import com.ecep.contract.model.CompanyInvoiceInfo;
-import com.ecep.contract.service.QueryService;
-import com.ecep.contract.service.ViewModelService;
 import com.ecep.contract.vm.CompanyInvoiceInfoViewModel;
+import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
 @Service
 
 public class CompanyInvoiceInfoService extends QueryService<CompanyInvoiceInfo, CompanyInvoiceInfoViewModel> {
 
     public List<CompanyInvoiceInfo> searchByCompany(Company company, String searchText) {
-        throw new UnsupportedOperationException("未实现");
+        Map<String, Object> params = new HashMap<>();
+        params.put("company", company);
+        params.put("searchText", searchText);
+        return findAll(params, Pageable.unpaged()).getContent();
     }
 }