refactor: Improve handling of server timezones in scheduled backups and tasks

Author: andrasbacsai

app/Console/Kernel.php

@@ -139,7 +139,7 @@ private function check_scheduled_backups($schedule)
             $server = $scheduled_backup->server();
 
             if (! $server) {
-                $serverTimezone = config('app.timezone');
+                continue;
             } else {
                 $serverTimezone = $server->settings->server_timezone;
             }
@@ -185,7 +185,7 @@ private function check_scheduled_tasks($schedule)
 
             $server = $scheduled_task->server();
             if (! $server) {
-                $serverTimezone = config('app.timezone');
+                continue;
             } else {
                 $serverTimezone = $server->settings->server_timezone ?: config('app.timezone');
             }