fix: [sync] Issue with events not updating on a pull
fix: [sync] Issue with events not updating on a pull

- overzealous protection removed
- Conditions blocking an event edit via a pull now rely on the locking mechanism, relaxed via an internal sync link

FIRSTdotorg/MISP,FIRSTdotorg/MISP,FloatingGhost/MISP,SteveClement/MISP,SteveClement/MISP,FIRSTdotorg/MISP,FIRSTdotorg/MISP,MISP/MISP,MISP/MISP,MISP/MISP,SteveClement/MISP,FloatingGhost/MISP,Rafiot/MISP,SteveClement/MISP,Rafiot/MISP,Rafiot/MISP,Rafiot/MISP,SteveClement/MISP,FloatingGhost/MISP,MISP/MISP,FloatingGhost/MISP,MISP/MISP