refactor: 对齐后端样例工程规范

backend/iot/cmd/main/main.go

@@ -0,0 +1,21 @@
+// IoT 进程入口；真实 MQTT TLS 适配将在设备协议和证书契约确认后接入。
+package main
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+
+	"git.apinb.com/bsm-sdk/core/printer"
+	"git.apinb.com/heqiapp/platforms/backend/iot/internal/config"
+	"git.apinb.com/heqiapp/platforms/backend/iot/internal/impl"
+)
+
+func main() {
+	config.New("PlatformIot")
+	impl.NewImpl()
+	printer.Info("[BSM - PlatformIot] Mock IoT adapter started; MQTT broker is not connected")
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+	<-quit
+}