Notification and email performance spans and/or breadcrumbs

[stayallive]

We could listen to the Illuminate\Mail\Events\MessageSending and Illuminate\Mail\Events\MessageSent events to figure out when an mail was sent and possibly nest the view rendering needed to sent that e-mail neatly underneath a mail span.

We could potentially also add a breadcrumb indicating an email was sent by the framework.

The same goes for notifications (which could trigger e-mails) with Illuminate\Notifications\Events\NotificationSending and Illuminate\Notifications\Events\NotificationSent.

[ankurk91]

@stayallive
Any plans for automated cron job monitoring?

https://docs.sentry.io/product/crons/getting-started/
https://laravel.com/docs/9.x/scheduling#events