Make stale relationship checker less restrictive

[ludamillion]

Currently, the state relationship checker throws an error when it finds that its snapshot is outdated. It would be useful to be able to change the behavior around this. There are at least two improvements that I think make sense.

1. Allow for DataWorks to be configured to do a soft stop or warning rather than throw an exception
2. Possibly make it simpler to toggle the check on and off. Configuration as above might not always be necessary.

[ageiersbach]

👏 👍