Add OperationsSignatureJob

app/jobs/operations_signature_job.rb

@@ -0,0 +1,15 @@
+class OperationsSignatureJob < ApplicationJob
+  queue_as :cron
+
+  def perform(*args)
+    last_midnight = Time.zone.today.beginning_of_day
+    operations_by_day = BillSignatureService.grouped_unsigned_operation_until(last_midnight)
+    operations_by_day.each do |day, operations|
+      begin
+        BillSignatureService.sign_operations(operations, day)
+      rescue
+        raise # let errors show up on Sentry and delayed_jobs
+      end
+    end
+  end
+end