chore: 初始开源发布

iotlcm-upstream-chan：运营商上游通道适配服务（统一 /sim/* 协议）。

- 内联原私有依赖：yunze-public → internal/pub/（10 包 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-chan
- 修复 mingqian 包测试：实现重构后 `adapter.operations` 字段已移除，
  测试断言按当前实现语义重写（不改产品行为）
- 凭据与内部标识脱敏：MySQL/Redis/Consul 凭据、私网与生产 IP、
  内网域名、真实手机号、注释里的真实 token/transid
- 移除内部资产：CI 触发器、生产通道种子 SQL、真实凭据测试资源文档
- 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/dx/sign.go

@@ -0,0 +1,69 @@
+package dx
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"sort"
+	"strings"
+	"time"
+)
+
+const (
+	// DefaultBaseURL 电信API基础地址
+	DefaultBaseURL = "https://cmp-api.ctwing.cn:20164"
+)
+
+// GetTimestampGMT 返回 GMT 时区的 yyyyMMddHHmmss 格式时间戳
+func GetTimestampGMT() string {
+	return time.Now().UTC().Format("20060102150405")
+}
+
+// OrderParams 将 URL params 按 key 字典序排序
+func OrderParams(params string) (string, error) {
+	if params == "" {
+		return "", nil
+	}
+	kvs := strings.Split(params, "&")
+	m := make(map[string]string, len(kvs))
+	for _, kv := range kvs {
+		idx := strings.Index(kv, "=")
+		if idx < 0 {
+			continue
+		}
+		m[kv[:idx]] = kv[idx+1:]
+	}
+	keys := make([]string, 0, len(m))
+	for k := range m {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+	var parts []string
+	for _, k := range keys {
+		parts = append(parts, k+"="+m[k])
+	}
+	return strings.Join(parts, "&"), nil
+}
+
+// SignMD5 对 reqStr 做 MD5 加密，返回小写十六进制字符串
+func SignMD5(reqStr string) string {
+	h := md5.Sum([]byte(reqStr))
+	return strings.ToLower(hex.EncodeToString(h[:]))
+}
+
+// BuildSign 构造签名：params + body + secretKey + timestamp → MD5 → hex
+func BuildSign(params, body, secretKey, timestamp string) (string, error) {
+	ordered, err := OrderParams(params)
+	if err != nil {
+		return "", err
+	}
+	reqStr := ordered + body + secretKey + timestamp
+	md5Str := SignMD5(reqStr)
+	return hex.EncodeToString([]byte(md5Str)), nil
+}
+
+// BuildSignV3 follows the V3 Java sample: encode the lowercase MD5 digest
+// string as hex a second time, then uppercase that outer encoding.
+func BuildSignV3(params, body, secretKey, timestamp string) (string, error) {
+	sign, err := BuildSign(params, body, secretKey, timestamp)
+	return strings.ToUpper(sign), err
+}