feat(bpm): 添加流程实例抄送功能

- 新增抄送用户编号数组字段
- 添加抄送原因校验规则
- 完善抄送请求VO结构定义
- 增加Swagger文档注解说明- 实现抄送用户不能为空的校验逻辑

jeelowcode-service/jeelowcode-service-bpm-biz/src/main/java/com/jeelowcode/service/bpm/controller/vo/instance/BpmProcessInstanceCopyCreateReqVO.java

@@ -1,10 +1,14 @@
 package com.jeelowcode.service.bpm.controller.vo.instance;
 
 import io.swagger.v3.oas.annotations.media.Schema;
+
 import javax.validation.constraints.NotBlank;
 import javax.validation.constraints.NotEmpty;
+
 import lombok.Data;
 
+import java.util.Collection;
+
 @Schema(description = "管理后台 - 流程实例抄送的创建 Request VO")
 @Data
 public class BpmProcessInstanceCopyCreateReqVO {
@@ -17,4 +21,8 @@ public class BpmProcessInstanceCopyCreateReqVO {
     @NotBlank(message = "抄送原因不能为空")
     private String reason;
 
+    @Schema(description = "抄送的用户编号数组", requiredMode = Schema.RequiredMode.REQUIRED, example = "[1,2]")
+    @NotEmpty(message = "抄送用户不能为空")
+    private Collection<Long> userIds;
+
 }