Add delayed cron job that is executed once a month and reates department skills snapshots

Author: RandomTannenbaum

app/jobs/monthly_department_skills_snapshot_job.rb

@@ -0,0 +1,8 @@
+class MonthlyDepartmentSkillsSnapshotJob < CronJob
+  # Perform job on first day of month at 3am
+  self.cron_expression = '0 3 1 * *'
+
+  def perform
+    DepartmentSkillsSnapshotBuilder.new.snapshot_all_departments
+  end
+end