The company was mandatory and prevented to use the module for models without
company_id. Also, there is currently no use case for a different configuration
for different companies. It simplifies the setup too.
If a use case exists for a different setup per company, it can be reintroduced
later with a optional company_id.
From rusty_record_reaper_runner to record_archiver.
Not that I dislike the old funny name, but I guess it will be easier to get
what it does with the new (maybe too serious) name.