fix: 修复 Gateway 流量卡接口路径、响应模型和时间戳与上游文档不一致

- 时间戳从 UnixMilli (13位) 改为 Unix (10位秒级)
- 实名状态接口路径 /realname-status → /realName
- 实名链接接口路径 /realname-link → /RealNameVerification
- RealnameStatusResp: status string → realStatus bool + iccid
- FlowUsageResp: usedFlow int64 → used float64 + iccid
- RealnameLinkResp: link → url

internal/gateway/client.go

@@ -72,7 +72,7 @@ func (c *Client) doRequest(ctx context.Context, path string, businessData interf
 		return nil, err
 	}
 
-	timestamp := time.Now().UnixMilli()
+	timestamp := time.Now().Unix()
 	sign := generateSign(c.appID, encryptedData, timestamp, c.appSecret)
 
 	reqBody := map[string]interface{}{

internal/gateway/flow_card.go

@@ -58,7 +58,7 @@ func (c *Client) QueryRealnameStatus(ctx context.Context, req *CardStatusReq) (*
 		},
 	}
 
-	resp, err := c.doRequest(ctx, "/flow-card/realname-status", businessData)
+	resp, err := c.doRequest(ctx, "/flow-card/realName", businessData)
 	if err != nil {
 		return nil, err
 	}
@@ -109,7 +109,7 @@ func (c *Client) GetRealnameLink(ctx context.Context, req *CardStatusReq) (*Real
 		},
 	}
 
-	resp, err := c.doRequest(ctx, "/flow-card/realname-link", businessData)
+	resp, err := c.doRequest(ctx, "/flow-card/RealNameVerification", businessData)
 	if err != nil {
 		return nil, err
 	}

internal/gateway/models.go

@@ -32,9 +32,9 @@ type FlowQueryReq struct {
 
 // FlowUsageResp 是查询流量使用的响应
 type FlowUsageResp struct {
-	UsedFlow int64  `json:"usedFlow" description:"已用流量"`
-	Unit     string `json:"unit" description:"流量单位（MB）"`
-	Extend   string `json:"extend,omitempty" description:"扩展字段（广电国网特殊参数）"`
+	ICCID string  `json:"iccid" description:"ICCID"`
+	Used  float64 `json:"used" description:"当月已用流量（MB）"`
+	Unit  string  `json:"unit" description:"流量单位（MB）"`
 }
 
 // CardOperationReq 是停机/复机请求
@@ -45,14 +45,13 @@ type CardOperationReq struct {
 
 // RealnameStatusResp 是实名认证状态的响应
 type RealnameStatusResp struct {
-	Status string `json:"status" description:"实名认证状态"`
-	Extend string `json:"extend,omitempty" description:"扩展字段（广电国网特殊参数）"`
+	ICCID      string `json:"iccid" description:"ICCID"`
+	RealStatus bool   `json:"realStatus" description:"实名状态（true=已实名, false=未实名）"`
 }
 
 // RealnameLinkResp 是实名认证链接的响应
 type RealnameLinkResp struct {
-	Link   string `json:"link" description:"实名认证跳转链接（HTTPS URL）"`
-	Extend string `json:"extend,omitempty" description:"扩展字段（广电国网特殊参数）"`
+	URL string `json:"url" description:"实名认证跳转链接（HTTPS URL）"`
 }
 
 // BatchQueryReq 是批量查询的请求