feat(业务用户组): AUG26-003 业务用户组与店铺负责人分组导入

- 迁移 000221：新增 tb_business_user_group、tb_business_user_group_member、tb_shop_business_owner_import_task，成员一账号一行由部分唯一索引保证，店铺所属组按当前负责人实时推导，不回填历史分组。
- 用户组 CRUD、成员改组/清空归属、店铺批量交接（原子失败不部分写入）。
- 店铺负责人 CSV 导入任务：逐行独立事务、逐行明细、任务级与行级失败分离。
- 读侧推导与筛选：未分组、业务线、停用组可筛出并带停用标记。
- 补齐操作审计动作与资源、openapi 清单、发布门禁巡检表清单。
- 归档 add-shop-salesperson-groups 变更并同步 openspec/specs/business-user-group，补齐 AUG26-003 验证证据链。

pkg/storage/service.go

@@ -36,7 +36,7 @@ func (s *Service) GenerateFileKey(purpose, fileName string) (string, error) {
 	if ext == "" {
 		ext = ".bin"
 	}
-	if (purpose == constants.StoragePurposeAssetPackageBatchOrder || purpose == constants.StoragePurposeDeviceBatchAllocation) && !strings.EqualFold(ext, ".csv") {
+	if (purpose == constants.StoragePurposeAssetPackageBatchOrder || purpose == constants.StoragePurposeDeviceBatchAllocation || purpose == constants.StoragePurposeShopBusinessOwnerImport) && !strings.EqualFold(ext, ".csv") {
 		return "", errors.New(errors.CodeInvalidParam, "批量业务文件必须为CSV格式")
 	}
 

pkg/storage/types.go

@@ -19,4 +19,7 @@ var PurposeMappings = map[string]PurposeMapping{
 	"attachment": {Prefix: "attachments", ContentType: ""},
 	constants.StoragePurposeAssetPackageBatchOrder: {Prefix: constants.AssetPackageBatchOrderStoragePrefix, ContentType: "text/csv"},
 	constants.StoragePurposeDeviceBatchAllocation:  {Prefix: constants.DeviceBatchAllocationStoragePrefix, ContentType: "text/csv"},
+	constants.StoragePurposeShopBusinessOwnerImport: {
+		Prefix: constants.ShopBusinessOwnerImportStoragePrefix, ContentType: "text/csv",
+	},
 }