A lot of the initial wallet sync is spent doing "restoration" = requesting and scanning filters from the hard-coded walletBirthday. But if the seed is being freshly generated, we don't need to restore. core will need to inform the wallet whether it is restoring from seed so that we can set the birthday appropriately.

We also don't know at wallet creation time whether the app seed was restored or created fresh. We'll need to persist that information in the client database app bucket.