Height undefined edge case

[ejmg]

Summary

Using Cuiloa for local debugging/testnet viewing while working on pindexer app views and realized that Cuiloa throws a hard errors on block height queries where height is undefined in the indexer (e.g. super early blocks). This is bad and should be handled.

[ejmg]

I think a better frame of reference is that, depending how Cuiloa is setup, there is no promise of a historical archive. So if someone is using Cuiloa and tries to view a block that is not present in the current index, there is a hard-error thrown. This should be handled more gracefully is the only issue to resolve.