@scheduler.scheduled_job("<STR_LIT>", minutes=<NUM_LIT:0.5>)<EOL>def check_db_for_missing_notifications():
config = dallinger.config.get_config()<EOL>participants = Participant.query.filter_by(status="<STR_LIT>").all()<EOL>reference_time = datetime.now()<EOL>run_check(participants, config, reference_time)<EOL>
Check the database for missing notifications.