add `edited` column to status table to mark if a mod/admin changed something

db/migrate/20190521003029_add_edited_to_statuses.rb

@@ -0,0 +1,5 @@
+class AddEditedToStatuses < ActiveRecord::Migration[5.2]
+  def change
+    add_column :statuses, :edited, :boolean
+  end
+end