It's currently possible to lose ordinals by broadcasting a commit transaction, but then losing the reveal transaction. We should avoid this.

Ideas:

• Save the reveal transaction to disk. Doesn't help if the reveal transaction is invalid, and so can never be broadcast.
• Add the reveal transaction descriptor, including the private key, to the bitcoin wallet, so bitcoin can spend it.
• Save the reveal transaction private key somewhere, so the user can intervene.
• Save a "recovery" transaction somewhere, that can be broadcast if the reveal transaction can't be mined that just returns coins to the wallet