chore: 初始开源发布

iotlcm-sms：独立短信 HTTP/gRPC 服务，支持阿里云与腾讯云。

- Go module 迁移至 git.5iot.com/iotlcm-public/iotlcm-sms
- 补 Apache-2.0 LICENSE，重写 README（特性/配置/接口/部署/目录/测试）
- 配置改为 config.example.yaml + SMS_* 环境变量注入，仓库不含真实凭证
- 清理内部标识（私有镜像仓库 / 公司名 / 客户签名 / 真实模板ID / 真实手机号）
- 统一 LF 行尾并加 .gitattributes

internal/sms/tencent/tencent.go

@@ -0,0 +1,67 @@
+package tencent
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/common"
+	"github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/common/profile"
+	tencentsdk "github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/sms/v20190711"
+
+	"git.5iot.com/iotlcm-public/iotlcm-sms/internal/sms"
+)
+
+type Provider struct{}
+
+func New() *Provider { return &Provider{} }
+
+func (p *Provider) Send(_ context.Context, config sms.Config, message sms.Message) (sms.Result, error) {
+	credential := common.NewCredential(config.AccessKeyID, config.AccessKeySecret)
+	clientProfile := profile.NewClientProfile()
+	clientProfile.HttpProfile.Endpoint = "sms.tencentcloudapi.com"
+	client, err := tencentsdk.NewClient(credential, "ap-beijing", clientProfile)
+	if err != nil {
+		return failed(err)
+	}
+
+	request := tencentsdk.NewSendSmsRequest()
+	request.SmsSdkAppid = common.StringPtr(config.SDKAppID)
+	request.Sign = common.StringPtr(config.SignName)
+	request.TemplateID = common.StringPtr(config.TemplateID)
+	request.TemplateParamSet = common.StringPtrs(sms.SplitAndTrim(message.MsgContent, "|"))
+	request.PhoneNumberSet = common.StringPtrs(sms.SplitAndTrim(message.PhoneNumber, ","))
+
+	response, err := client.SendSms(request)
+	if err != nil {
+		return failed(err)
+	}
+	if response.Response == nil || len(response.Response.SendStatusSet) == 0 {
+		err = fmt.Errorf("腾讯云未返回短信发送状态")
+		return failed(err)
+	}
+
+	status := response.Response.SendStatusSet[0]
+	data := map[string]any{
+		"provider":     "tencent",
+		"requestId":    stringValue(response.Response.RequestId),
+		"serialNo":     stringValue(status.SerialNo),
+		"phoneNumber":  stringValue(status.PhoneNumber),
+		"providerCode": stringValue(status.Code),
+	}
+	if stringValue(status.Code) != "Ok" {
+		err = fmt.Errorf("腾讯云短信发送失败: %s", stringValue(status.Message))
+		return sms.Result{Code: 502, Message: err.Error(), Data: data}, err
+	}
+	return sms.Result{Code: 0, Message: "发送成功", Data: data}, nil
+}
+
+func failed(err error) (sms.Result, error) {
+	return sms.Result{Code: 502, Message: err.Error()}, err
+}
+
+func stringValue(value *string) string {
+	if value == nil {
+		return ""
+	}
+	return *value
+}