Core: some low-hanging fruit on the strict type check

[beauxq]

What is this fixing or adding?

Just some low-hanging fruit on the task of moving core towards strict type checking.

A few are empty __init__.py files, but it's still good to type check them because code could be added to them in the future. A few required no changes. A few required small changes.

bump pyright version

How was this tested?

just what's done in CI