Change how slots for events are prioritized

[CodeyBoi]

Right now the priority for event registrations are only sorted by time of registration (with some exceptions for certain priority groups). This means that the server gets DDoS:d every time an event registration opens, and it also means that it's super stressful to register (if for example 100 slots were taken in the first minute!)

This could perhaps be solved with a ”grace period” for the first 2-4 hours? That is, a period where no regard to time registered is made, and then the slots are randomly assigned.

[Lullebullelukas]

Should we have some kind of project group deciding how this should be handled? It feels as if we can't just decide on our own

[Lullebullelukas]

In the future version of fsektionen.se we should implement this and there should be different types of event sign ups.
Some reasonable types should be:
First come first serve
Lottery with prio
Lottery with prio atleast one mentor
Fully custom (somehow)

and also maybe a switch where you can audit the spots before the announcement goes out, aka a "dry run" which gives you a supposed spot list which you can edit.

Could be worth a lot of time saving if we do it right :)