Run ruff lint

[loneil]

#974 has added ruff format checking. Now that ruff is set up can use it for a lint as well.

Can add documentation, appropriate scripting (manage and actions) for doing a lint stage after format

- name: Lint with ruff
  working-directory: ./oidc-controller
  run: |
    poetry run ruff check .

Can add a [tool.ruff.lint] (and .format if we want) to pyproject for any specific settings we want as defaults for ruff
https://docs.astral.sh/ruff/configuration/

Should run ruff check . locally and determine if any fixes needed (just tried on the branch from the issue above and only see 1 now)