Function and action that scans and reports on the “health/integrity” of a repo periodically

[elray1]

We may like to:

• [ ] add a function that checks all submitted model output files, model metadata files, and/or hub config files
• [ ] set up a github action workflow definition that runs this function on a repo

[elray1]

See also https://github.com/Infectious-Disease-Modeling-Hubs/hubverse-actions/issues/12