Add pruning of reports older than a week

app/logical/danbooru_maintenance.rb

@@ -17,6 +17,7 @@ module DanbooruMaintenance
     safely { TagChangeRequestPruner.warn_all }
     safely { TagChangeRequestPruner.reject_all }
     safely { Ban.prune! }
+    safely { ModerationReport.prune! }
     safely { CuratedPoolUpdater.update_pool! }
     safely { ActiveRecord::Base.connection.execute("vacuum analyze") unless Rails.env.test? }
   end

app/models/moderation_report.rb

@@ -54,4 +54,8 @@ class ModerationReport < ApplicationRecord
 
     q.apply_default_order(params)
   end
+
+  def self.prune!
+    where("created_at < ?", 1.week.ago).delete_all
+  end
 end