message: ci: always execute tests on non-PRs
diff: # to check for python changes, run with CHECKS=python
  # To check for frontend changes, run with CHECKS=frontend
  # To check for python and frontend changes, run with CHECKS="python frontend"
  +if [[ -z ${PR_NUMBER} ]]; then
  + echo "Not a PR; Exiting with FAILURE code"
  + exit 1
  +fi
  URL="https://api.github.com/repos/${GITHUB_REPO}/pulls/${PR_NUMBER}/files"
  FILES=$(curl -s -X GET -G "${URL}" | jq -r '.[] | .filename')
  