Adds a daily perform_maintenance Celery task and implements cleanup for old django-reversion revisions based on work in #579 .
The actual revision cleanup work is drastically simplified here. The django admin command used in the previous PR was based on django-reversion's own admin command and was made much more complicated than necessary for our use case because of the abstraction the django-reversion command affords. The tables for revisions and versions in Kobocat are potentially enormous, so I decided that the simplest approach was the best, rather than filtering and iterating over hundreds of millions of rows.
Adds a daily
perform_maintenanceCelery task and implements cleanup for old django-reversion revisions based on work in #579 .The actual revision cleanup work is drastically simplified here. The django admin command used in the previous PR was based on django-reversion's own admin command and was made much more complicated than necessary for our use case because of the abstraction the django-reversion command affords. The tables for revisions and versions in Kobocat are potentially enormous, so I decided that the simplest approach was the best, rather than filtering and iterating over hundreds of millions of rows.