.really_destroy! should not destroy has_many :through records

[atd]

Despite of counter intuitive, Rails API states that has_many :through records must not be destroyed, but their associations https://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html#method-i-has_many

If using with the :through option, the association on the join model must be a belongs_to, and the records which get deleted are the join records, rather than the associated records.

paranoia should have the same behavior