Log once off jobs and enqueue on db:migrate

db/migrate/20160407180149_create_onceoff_logs.rb

@@ -0,0 +1,10 @@
+class CreateOnceoffLogs < ActiveRecord::Migration
+  def change
+    create_table :onceoff_logs do |t|
+      t.string :job_name
+      t.timestamps null: false
+    end
+
+    add_index :onceoff_logs, :job_name
+  end
+end