Wrap upgrade script commands in a transaction.

Signed-off-by: DL6ER <dl6er@dl6er.de>

advanced/Scripts/database_migration/gravity/1_to_2.sql

@@ -1,3 +1,7 @@
+.timeout 30000
+
+BEGIN TRANSACTION;
+
 CREATE TABLE domain_audit
 (
 	id INTEGER PRIMARY KEY AUTOINCREMENT,
@@ -6,3 +10,5 @@ CREATE TABLE domain_audit
 );
 
 UPDATE info SET value = 2 WHERE property = 'version';
+
+COMMIT;