feat(messages): attachment retention task

config/app_config.yml.SAMPLE

@@ -173,6 +173,9 @@ default: &defaults
   # default to allow automatically adding new articles on sync only when less than 200 articles in total
   #shared_supplier_article_sync_limit: 200
 
+  # number of days after which attachment files get deleted
+  #attachment_retention_days: 365
+
 development:
   <<: *defaults
 

config/schedule.rb

@@ -12,9 +12,10 @@ every :weekday, at: %w[5:56am 6:04pm] do
   rake 'multicoops:run TASK=foodsoft:import_and_assign_bank_transactions'
 end
 
-# Weekly taks
+# Weekly tasks
 every :sunday, at: '7:14 am' do
   rake 'multicoops:run TASK=foodsoft:create_upcoming_periodic_tasks'
+  rake 'multicoops:run TASKS=foodsoft:prune_old_attachments'
 end
 
 # Finish ended orders