have some history of all created auto_schema hashes

[lolopinto]

if a change is made and downgraded without committing to source control and then we see a reference to it later, it's very hard to debug what happened

  auto_schema error: Can't locate revision identified by '2b36c3cabffc'

is very cryptic and doesn't provide much information

[lolopinto]

related/depends on https://github.com/lolopinto/ent/issues/1046