We recently added todo comment checking as part of the server commit queue. This is
useful, but fails a commit-queue entry if something is wrong. It would be nice to have
some early checks as well to warn engineers that there is an issue before submitting to
the commit-queue.

One possible solution is to add the check to the upload.py script. This script already
has options to do things like linting, so the todo check should fit in with those.

As a database contributor,
I want to about unresolved todo in my code before commit-queue time,
So that I can fix them before I submit my code to the commit-queue.

AC:

• Check for Todo comments happe as part of running upload.py