nostr:npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z
What about ..i just thinking
If u use the local db only for ur data and u sent these to some relays which makes an cryptovraphic match with ur id and the can be stored here bit it only functions as an slave device not master the master is the local db.
And the relay itself has to be forced the demand if u want to delete ur account.
And this goes also over crypto key verfifying.
May s. Thoughts too crude sorry not a dev