feat: C 端查询及设备导入接口 DTO 新增 realname_policy 字段

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

internal/model/dto/client_realname_device_dto.go

@@ -45,6 +45,7 @@ type DeviceCardItem struct {
 	RealNameStatus int    `json:"real_name_status" description:"实名状态 (0:未实名, 1:已实名)"`
 	SlotPosition   int    `json:"slot_position" description:"插槽位置"`
 	IsActive       bool   `json:"is_active" description:"是否当前激活卡"`
+	RealnamePolicy string `json:"realname_policy" description:"实名认证策略 (none:无需实名, before_order:先实名后充值/购买, after_order:先充值/购买后实名)"`
 }
 
 // DeviceCardListResponse F1 设备卡列表响应