nip101e (not merged) - i wrote the draft spec for workout type events 1.5 years ago, but this is what RUNSTR (npub1vyg…vy4e) is using and what POWR (npub1p0w…vpjk) uses
https://github.com/nostr-protocol/nips/pull/1816
https://testflight.apple.com/join/Whx9PTvR
