chore: add convert backup size from bytes to Mib

utils/config.go

@@ -37,7 +37,7 @@ type MailConfig struct {
 }
 type NotificationData struct {
 	File            string
-	BackupSize      int64
+	BackupSize      uint64
 	Database        string
 	StartTime       string
 	EndTime         string

utils/utils.go

@@ -254,3 +254,7 @@ func CronNextTime(cronExpr string) time.Time {
 	next := schedule.Next(now)
 	return next
 }
+
+func BytesToMb(b uint64) uint64 {
+	return b / 1024 / 1024
+}