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/controller/channel/channel_v1_refresh.go

@@ -0,0 +1,25 @@
+package channel
+
+import (
+	"context"
+
+	v1 "git.5iot.com/iotlcm-public/iotlcm-upstream-proxy/api/channel/v1"
+	"git.5iot.com/iotlcm-public/iotlcm-upstream-proxy/internal/service"
+)
+
+func (c *ControllerV1) Refresh(ctx context.Context, req *v1.RefreshReq) (res *v1.RefreshRes, err error) {
+	if err = service.UpstreamAPI().RefreshChannel(ctx, req.ChanKey); err != nil {
+		return nil, err
+	}
+	return &v1.RefreshRes{
+		ChanKey:   req.ChanKey,
+		Refreshed: true,
+	}, nil
+}
+
+func (c *ControllerV1) Remove(ctx context.Context, req *v1.RemoveReq) (res *v1.RemoveRes, err error) {
+	if err = service.UpstreamAPI().RemoveChannel(ctx, req.ChanKey); err != nil {
+		return nil, err
+	}
+	return &v1.RemoveRes{ChanKey: req.ChanKey, Removed: true}, nil
+}