#[CronTask]
Attribute on methods.
Handles a one-time WP-Cron task that CronScheduler::schedule() plans.
The first parameter of the method is the task: a value class whose object
carries the data of the task. Further parameters are services. Each task class
has exactly one handler. The hook of the task is
wp_app_framework/cron/{slug}/task/{name}; scheduled tasks stay attached to
the name, so keep it when you rename the class or the method.