Add a delete functionality for Self Reported messages (soft delete)

[markusmann-vg]

Feature Description

Users with the right to delete self-reported messages should be able to delete messages.

Added Value/Benefit

As the data quality of self-reported messages might differ a lot and it's very likely that a lot of unusable data might enter the system the users who process self-reported messages might want to delete the messages.

Acceptance Criteria

• [ ] Have an option to delete a single SelfReported Messages in the detail view
• [ ] a delete trigger executes a soft delete, that means that we also have a undelete option
• [ ] the soft deleted self-reported message will be deleted in the nightly cron job
• [ ] The deletion of self-reported messages is described in the deletion documentation

Implementation Details

No response

Mockups

No response

Additional Information

No response