this seems to be the answer: identity key is non custodial,…

this seems to be the answer: identity key is non custodial, but of course the paymail is, so neither can be considered as a stable ID (keys can be stolen, paymails can be banned) but let's build better solutions
https://twetch.app/t/74dc87bc6614e3951d09da8663731afd9ec22a66f1f0a018f25fbfed8d7d4707