Fix Scheduler::SubscriptionsScheduler (#2834)

* Fix Scheduler::SubscriptionsScheduler, add worker test for it

* Change production log level of Sidekiq to "warn" instead of "info"

app/workers/distribution_worker.rb

@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
-class DistributionWorker < ApplicationWorker
+class DistributionWorker
   include Sidekiq::Worker
 
   def perform(status_id)
     FanOutOnWriteService.new.call(Status.find(status_id))
   rescue ActiveRecord::RecordNotFound
-    info("Couldn't find the status")
+    true
   end
 end