This is a start to have different kinds of notifications. It is
possible to be notified via e-mail, matrix or gotify. It also extends
the current "periodic query" for due items by allowing notification
over different channels. A "generic periodic query" variant is added
as well.
There are models for Spanish, that have been added now. Also the
Hungarian language has been added to the list of supported
languages (for tesseract mainly, no nlp models)
It was wrongly stored using RPeriodicTask directly, but the higher
level `UserTask` must be used instead, because this ensures a
correctly scoped periodic task using the `updateOneTask` method. Since
this is a system task, it can be given a fixed ID which makes it now
safe even if stored using RPeriodicTask directly.
The bug resulted in multiple empty-trash tasks to be inserted (on each
restart).
Refs: #347
In order to keep deleted items for a while, the periodic task can now
use a duration to only remove items with a certain age. This can be
used to ensure that a deleted item stays at least X days before it
will be removed from the database.
Refs: #347
Before, there were periodic tasks run per collective and not user by
making sure that submitter + group are the same value. This is now
encoded in `UserTaskScope` so it is now obvious and errors can be
reduced when using this.
It's not very likely to have more modes of search besides normal and
trashed, but got surprised in that way quite often and it's nicer this
way anyways.
When deleting items via the http api, they are not deleted anymore but
a new status "Deleted" is set. The collective insights contains now a
count separately for deleted items.
