fix: resolve traffic reset time generation and refactor reset logic

- Add fix-null mode to ResetTraffic command
- Refactor reset logic for better separation of concerns
- Update migration to reuse fix functionality

app/Console/Commands/XboardUpdate.php

@@ -45,6 +45,7 @@ class XboardUpdate extends Command
         Artisan::call("migrate");
         $this->info(Artisan::output());
         Artisan::call('horizon:terminate');
+        Artisan::call('reset:traffic', ['--fix-null' => true]);
         $updateService = new UpdateService();
         $updateService->updateVersionCache();
         $themeService = app(ThemeService::class);