Merge parent_id migration into single 2026021000 upgrade script

SQL/mysql/2026021000.sql

@@ -74,3 +74,13 @@ ALTER TABLE `ident_switch`
 		smallint
 		DEFAULT NULL
 		AFTER `notify_sound`;
+
+-- Add alias support: parent_id links an alias identity to a parent account
+ALTER TABLE `ident_switch`
+	ADD `parent_id`
+		int UNSIGNED
+		DEFAULT NULL
+		AFTER `iid`;
+
+ALTER TABLE `ident_switch`
+	ADD INDEX `IX_ident_switch_parent_id` (`parent_id`);

SQL/mysql/2026021100.sql

@@ -1,9 +0,0 @@
--- Add alias support: parent_id links an alias identity to a parent account
-ALTER TABLE `ident_switch`
-	ADD `parent_id`
-		int UNSIGNED
-		DEFAULT NULL
-		AFTER `iid`;
-
-ALTER TABLE `ident_switch`
-	ADD INDEX `IX_ident_switch_parent_id` (`parent_id`);