Inside your package you can run (Laravel 4.1+):
Artisan::call('migrate', array('option' => '--package', 'argument' => 'cartalyst/sentry'));
Artisan::call('config:publish', array('argument' => 'cartalyst/sentry'));
Docs: http://laravel.com/docs/commands#calling-other-commands
On older versions:
Artisan::call('migrate --package=cartalyst/sentry');
Artisan::call('config:publish cartalyst/sentry'):