Schedule notices queue is blocked by broken records (loanId doesn't exist, template doesn't exist, loan policy doesn't exist etc.)
1. Scheduled notices that have references to non-existing entities (loans, loan policies, templates, users) should be deleted in scope of Schedule processor flow
2. Tests should be added to cover flow with broken schedule notice records.
Table name - scheduled_notice
Method to start from - org.folio.circulation.domain.notice.schedule.DueDateScheduledNoticeHandler#handleDueDateNotice