feat: 实现WebSocket通信框架及任务管理功能

新增WebSocket客户端和服务端通信框架，包括会话管理、心跳检测和自动重连机制
添加任务管理器用于处理WebSocket任务创建和执行
实现消息回调处理和错误处理机制
重构销售类型服务并添加缓存支持
移除旧的销售类型服务实现

client/src/main/java/com/ecep/contract/service/CompanyCustomerFileTypeService.java

@@ -0,0 +1,4 @@
+package com.ecep.contract.service;
+
+public class CompanyCustomerFileTypeService {
+}

client/src/main/java/com/ecep/contract/service/CompanyInvoiceInfoService.java

@@ -0,0 +1,19 @@
+package com.ecep.contract.controller.project;
+
+import java.util.List;
+
+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.stereotype.Service;
+
+@Service
+
+public class CompanyInvoiceInfoService extends QueryService<CompanyInvoiceInfo, CompanyInvoiceInfoViewModel> {
+
+    public List<CompanyInvoiceInfo> searchByCompany(Company company, String searchText) {
+        throw new UnsupportedOperationException("未实现");
+    }
+}

client/src/main/java/com/ecep/contract/service/CompanyVendorFileTypeService.java

@@ -0,0 +1,4 @@
+package com.ecep.contract.service;
+
+public class CompanyVendorFileTypeService {
+}

client/src/main/java/com/ecep/contract/service/HolidayService.java

@@ -0,0 +1,4 @@
+package com.ecep.contract.service;
+
+public class HolidayService {
+}

client/src/main/java/com/ecep/contract/service/SaleTypeService.java

@@ -1,16 +0,0 @@
-package com.ecep.contract.service;
-
-import org.springframework.stereotype.Service;
-
-import com.ecep.contract.model.ProjectSaleType;
-import com.ecep.contract.vm.ProjectSaleTypeViewModel;
-
-@Service
-public class SaleTypeService extends QueryService<ProjectSaleType, ProjectSaleTypeViewModel> {
-
-    public ProjectSaleType findByName(String name) {
-        // TODO Auto-generated method stub
-        throw new UnsupportedOperationException("Unimplemented method 'findByName'");
-    }
-
-}