Add 'Create ERD' step to CI/CD pipeline

[dpgraham4401]

🚀 Feature Request

PR should include github action that builds the Entity Relationship Diagram (ERD) in our documentation.

Specs

1. it should only run when there are new migration scripts
   • we have other workflows that do this, see examples for path filters.
2. It will need to install the graphviz header files
   • apt-get install graphviz graphviz-dev
3. It will need to install pygraphviz which can be done
   • pip install pygraphviz
4. It can execute the creation of the new image with the runhaz.sh script like so
   • ./runhaz.sh -e
5. It then needs to commit that newly generated ERD and push it to GitHub
   • which branch and what part of the CI/CD pipeline does this run on.
   • If possible, we would prefer this run in the context of the PR, commits back to the PR branch which then gets squashed on merge by the maintainers.
   • This needs to run before the docs are deployed to GH pages.

For now I may just keep generating locally.

[dpgraham4401]

see community discussion on adding commits to a PR from github actions here https://github.com/orgs/community/discussions/24945#discussioncomment-3245946

[dpgraham4401]

see our documentation on generating the ERD here https://usepa.github.io/haztrak/design/db-design.html#notes-on-generating-the-erd