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/aliyun/aliyun.go

@@ -0,0 +1,56 @@
+package aliyun
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"strings"
+
+	"github.com/aliyun/alibaba-cloud-sdk-go/services/dysmsapi"
+
+	"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) {
+	regionID := config.RegionID
+	if regionID == "" {
+		regionID = "cn-hangzhou"
+	}
+	client, err := dysmsapi.NewClientWithAccessKey(regionID, config.AccessKeyID, config.AccessKeySecret)
+	if err != nil {
+		return failed(err)
+	}
+
+	request := dysmsapi.CreateSendSmsRequest()
+	request.Scheme = "https"
+	request.PhoneNumbers = strings.Join(sms.SplitAndTrim(message.PhoneNumber, ","), ",")
+	request.SignName = config.SignName
+	request.TemplateCode = config.TemplateID
+	request.TemplateParam = message.MsgContent
+
+	response, err := client.SendSms(request)
+	if err != nil {
+		return failed(err)
+	}
+	data := map[string]any{
+		"provider":     "aliyun",
+		"requestId":    response.RequestId,
+		"bizId":        response.BizId,
+		"providerCode": response.Code,
+	}
+	if response.Code != "OK" {
+		err = fmt.Errorf("阿里云短信发送失败: %s", response.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) {
+	var sdkDetail map[string]any
+	_ = json.Unmarshal([]byte(err.Error()), &sdkDetail)
+	return sms.Result{Code: 502, Message: err.Error(), Data: sdkDetail}, err
+}