Add create and last_update columns to models

[sea-kelp]

Fixes issue

1008

Description of Changes

Add creation and last update columns to track when and by whom models were updated.

Notes for Deployment

Run alembic migration

Screenshots (if appropriate)

N/A

Tests and linting

• [x] This branch is up-to-date with the develop branch.
• [x] pytest passes on my local development environment.
• [x] pre-commit passes on my local development environment.