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/pub/xjpublogic/httpclient/upstream_proxy_client.go

@@ -0,0 +1,37 @@
+package httpclient
+
+import (
+	"context"
+
+	"git.5iot.com/iotlcm-public/iotlcm-upstream-proxy/internal/pub/xjpubconsts"
+	"git.5iot.com/iotlcm-public/iotlcm-upstream-proxy/internal/pub/xjpubmodel"
+	"git.5iot.com/iotlcm-public/iotlcm-upstream-proxy/internal/pub/xjpubmodel/response"
+	"git.5iot.com/iotlcm-public/iotlcm-upstream-proxy/internal/pub/xjpubservice"
+)
+
+type sUpstreamProxyClient struct {
+}
+
+func NewUpstreamProxyClient() *sUpstreamProxyClient {
+	return &sUpstreamProxyClient{}
+}
+
+func init() {
+	xjpubservice.RegisterUpstreamProxyClient(NewUpstreamProxyClient())
+}
+
+// 物联网卡在线信息实时查询
+func (s *sUpstreamProxyClient) QuerySimSession(ctx context.Context, input *xjpubmodel.SimSessionInput) (output *xjpubmodel.SimSessionOutput, err error) {
+	res := &response.ResponseGeneric[*xjpubmodel.SimSessionOutput]{}
+	err = xjpubservice.HttpClient().PostObj(ctx, xjpubconsts.ServiceNameYzUpstreamChanSvc, "/query/sim-session", input, res)
+	output = res.Data
+	return output, err
+}
+
+// 物联网卡卡状态查询
+func (s *sUpstreamProxyClient) QuerySimCardStatus(ctx context.Context, input *xjpubmodel.SimCardStatusInput) (output *xjpubmodel.SimCardStatusOutput, err error) {
+	res := &response.ResponseGeneric[*xjpubmodel.SimCardStatusOutput]{}
+	err = xjpubservice.HttpClient().PostObj(ctx, xjpubconsts.ServiceNameYzUpstreamChanSvc, "/query/sim-status", input, res)
+	output = res.Data
+	return output, err
+}