Consider using positional-only arguments more consistently

[FasterSpeeding]

Summary

These are already used in some places such as the cache and a few rest methods but it'd be nice if this was more consistently applied, a place where this could easily just be blanket applied without hurting existing code is the entity and event factories.

Why is this needed?

Ideal implementation

To be decided.

Checklist

• [X] I have searched the issue tracker and have made sure it's not a duplicate. If it is a follow up of another issue, I have specified it.