feat: 新增数据库迁移，重命名 device_no 为 virtual_no，新增 iot_card.virtual_no 和 package.virtual_ratio 字段

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

internal/model/dto/device_import_dto.go

@@ -49,9 +49,9 @@ type ListDeviceImportTaskResponse struct {
 }
 
 type DeviceImportResultItemDTO struct {
-	Line     int    `json:"line" description:"行号"`
-	DeviceNo string `json:"device_no" description:"设备号"`
-	Reason   string `json:"reason" description:"原因"`
+	Line      int    `json:"line" description:"行号"`
+	VirtualNo string `json:"virtual_no" description:"设备虚拟号"`
+	Reason    string `json:"reason" description:"原因"`
 }
 
 type GetDeviceImportTaskRequest struct {