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_asset_dto.go

@@ -26,6 +26,7 @@ type AssetInfoResponse struct {
 	StatusName         string     `json:"status_name" description:"状态名称（中文）"`
 	RealNameStatus     int        `json:"real_name_status" description:"实名状态（0:未实名, 1:已实名）"`
 	RealNameStatusName string     `json:"real_name_status_name" description:"实名状态名称（中文）"`
+	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)"`
 	CarrierName        string     `json:"carrier_name" description:"运营商名称"`
 	Generation         string     `json:"generation" description:"世代"`
 	WalletBalance      int64      `json:"wallet_balance" description:"钱包余额（分）"`