What do you recommend regarding consistency between spicedb and a primary data store? Is it best to treat spicedb as effectively a part of the primary store, rolling back transactions if spicedb is down or fails for some reason? Or is it acceptable to replicate changes to the primary store in an eventually consistent manner? I see some motion in authzed toward things like tailing write ahead logs and what have you. Is there any risk in doing that if replication fails?