Update DB WAL before backup

database/db.go

@@ -110,3 +110,12 @@ func IsSQLiteDB(file io.Reader) (bool, error) {
 	}
 	return bytes.Equal(buf, signature), nil
 }
+
+func Checkpoint() error {
+	// Update WAL
+	err := db.Exec("PRAGMA wal_checkpoint;").Error
+	if err != nil {
+		return err
+	}
+	return nil
+}