Auto data health checks

[northdpole]

once the auto-backups are in place create an action that downloads the latest database from heroku and compares it to the latest known good state. If the known good state data isn't equivalent to the heroku ones, fail.

This might be possible by just dumping dbs, filtering out heroku custom things and checking for string equivalence

[northdpole]

problem: known good state needs to be a heroku backup, it cannot be a local sqlite situation. ideally local dev would also be a postgresql container, this would make data migration pretty trivial.