chore: 初始开源发布

iotlcm-upstream-proxy：渠道缓存与转发网关。

- 内联原私有依赖：yunze-public → internal/pub/（18 文件），
  yunze-pb/pb → internal/pb/（9 文件）；Consul 注册改用官方
  gogf/gf/contrib/registry/consul/v2（API 兼容）
- Go module：yz-svr → git.5iot.com/iotlcm-public/iotlcm-upstream-proxy
- 凭据与内部标识脱敏：MySQL/Redis/Consul 凭据、私网与生产 IP、内网域名
- 移除内部资产：CI 触发器
- Dockerfile 改用公共基础镜像，移除写死的 registry 凭据
- 补 Apache-2.0 LICENSE，重写 README，LF 行尾 + .gitattributes

internal/logic/upstreamimpl/gateway_response.go

@@ -0,0 +1,32 @@
+package upstreamimpl
+
+import (
+	"encoding/json"
+	"fmt"
+	"git.5iot.com/iotlcm-public/iotlcm-upstream-proxy/internal/model"
+	"strings"
+
+	"github.com/gogf/gf/v2/errors/gerror"
+	"github.com/gogf/gf/v2/net/gclient"
+)
+
+func readGatewayResponse(response *gclient.Response) (model.SimBaseResJson, error) {
+	defer response.Close()
+	body := response.ReadAll()
+	var output struct {
+		Code    *int                 `json:"code"`
+		Message string               `json:"message"`
+		Data    model.SimBaseResJson `json:"data"`
+	}
+	if err := json.Unmarshal(body, &output); err != nil {
+		return nil, gerror.Wrap(err, "解析网关响应失败")
+	}
+	if response.StatusCode < 200 || response.StatusCode >= 300 || output.Code == nil || *output.Code != 0 {
+		message := strings.TrimSpace(output.Message)
+		if message == "" {
+			message = fmt.Sprintf("网关响应无效，HTTP状态码：%d", response.StatusCode)
+		}
+		return nil, gerror.New(message)
+	}
+	return output.Data, nil
+}