Brutal redesign of notification status changes

Brutal redesign of notification status changes
- Authorization done before heavy functions (such as event bundling)
- Authorization flags propagate to calling function
- Copies are created if flags indicate changes in job status (blackening, anonymization, bundling events)
- Copies are kept until all notification registrations are processed for that job to avoid repetition
- Code works Xcept for bundling events, which needs extending with anonymization features anyway