I went through the sync room code today while thinking about syncing. As
I worked through it, I added some comments etc for my own readability.
There is no change in how the code works.
There are a few functions declared in the body of `handlePushRequest`.
We might want to re-arrange things so that we're not re-declaring those
on each push (there are a LOT of pushes, basically every mouse move from
every client). I did try that but reverted that change; it feels like a
proper solution would be bigger than what I wanted to do here.
### Change Type
- [x] `internal` — Any other changes that don't affect the published
package[^2]
b379a7a47c