feat(system): 为DeptDataPermissionRespDTO添加部门编号字段

- 在DeptDataPermissionRespDTO中添加deptId字段，用于表示用户所在的部门编号
- 初始化deptId为null
- 更新DTO结构，增加新的字段描述

yudao-module-system/yudao-module-system-api/src/main/java/cn/iocoder/yudao/module/system/api/permission/dto/DeptDataPermissionRespDTO.java

@@ -19,10 +19,14 @@ public class DeptDataPermissionRespDTO {
     @Schema(description = "可查看的部门编号数组", requiredMode = Schema.RequiredMode.REQUIRED, example = "[1, 3]")
     private Set<Long> deptIds;
 
+    @Schema(description = "自己的部门编号", requiredMode = Schema.RequiredMode.REQUIRED, example = "128")
+    private Long deptId;
+
     public DeptDataPermissionRespDTO() {
         this.all = false;
         this.self = false;
         this.deptIds = new HashSet<>();
+        this.deptId = null;
     }
 
 }