[Feature Request] Automatically delete completed tasks after a specified time

[fsasm]

Tasks which are completed and have reached a given age, e.g. 3 months, should be automatically deleted. It would be nice to set this age per list, as some lists contain mainly short-lived tasks, where one does not care about them after some time and other lists contain important tasks, where even completed they should not be deleted automatically.

Why? Some apps, like GNOME Todo, also show completed apps but do not hide them, meaning one has to regularly delete completed tasks. Also some people, like myself, like to create and complete 20-50 tasks per week. This can quickly accumulated quite a large number of tasks.

[joshtrichards]

See #2125 (comment)

This is a CalDAV matter, not Tasks.

[joshtrichards]

Tracking in nextcloud/server#44758