Add default solid queue cleanup job

Solid Queue added this in a recent release but since it only
applies at installation time, we did not yet have it.

Author: oneiros

config/recurring.yml

@@ -9,6 +9,9 @@
 #     priority: 2
 #     schedule: at 5am every day
 production:
+  clear_solid_queue_finished_jobs:
+    command: "SolidQueue::Job.clear_finished_in_batches(sleep_between_batches: 0.3)"
+    schedule: every hour at minute 12
   delete_expired_activity:
     class: DeleteExpiredActivityJob
     schedule: every hour