is_author is now denormalized (and used in filters)

app/controllers/admin/university/people_controller.rb

app/models/communication/website/post.rb

app/models/university/person.rb

app/models/university/person/administrator.rb

app/models/university/person/alumnus.rb

app/models/university/person/author.rb

app/models/university/person/researcher.rb

app/models/university/person/teacher.rb

app/services/filters/admin/university/people.rb

app/views/admin/communication/website/posts/index.html.erb

...rate/20220425150705_add_is_author_to_university_people.rb

db/schema.rb

lib/tasks/app.rake