Add automatic checks for keeping repo in sync with scheduler

[C-Loftus]

One of the challenges with making changes to scheduler is that it will typically also result in changes to this repo.

Since this repo does a fair bit of templating and mapping of env vars, it is relatively easy to accidentally miss a variable or break the script in some way.

While it is currently out of scope, it seems like it may one day make sense to have some sort of helper script that can check all the env vars in the scheduler .env file on main and then make sure all of them show up in this repo, or something or that nature. While it is not a full test, I think some sanity checks are useful.