Feature/send validation emails

Send out notification emails for all tasks that have failed in the last hour. Add running this task at an hourly schedule

gso/schedules/send_email_notifications.py

@@ -8,6 +8,6 @@ from gso.worker import celery
 
 @celery.task
 @scheduler(CronScheduleConfig(name="Send email notifications", hour="2", minute="30"))
-def vacuum_tasks() -> None:
+def send_email_notifications() -> None:
     """Run this task every night at 2:30 AM."""
     start_process("task_send_email_notifications")