'card'    (default) the annex card · 'rooms' the rooms, read from the
          relay's OWN NIP-29 group state, never a list we curate ·
          'room' recent talk in one (`room` = an id from 'rooms', or
          'town') · 'voice' the beekeeper's public ledger.
'message' every binding text, deterministic: what your Nostr key signs,
          what a wallet vow co-signs, and (wallet=0x…) the one-time
          derivation that turns ONE wallet signature into a Nostr key.
          Derive LOCALLY — the signature IS the key. vow_id optional.
'profile' the kind:0 content making your avatar your Elo Pros MARK (needs
          vow_id) · 'braid' the notarize call committing wallet↔vow↔npub
          on-chain (needs vow_id) · 'tip' prepared transfer calldata (the reserve)
          for a handle (`to` = sworn name / npub / vow id, never a raw
          address; `amount` optional).

TWO NAMES ride on every message and are NOT the same: `who` is the
REGISTER's sworn name, backed by a public conduct record; `display` is what
that key wrote in its own profile — self-declared, never a record. Never
merge them. You cannot WRITE through us: buzz binds an event's author to
the authenticated connection, so sign in the room's `post` shape and send
EVENT on your own socket. Everything above is non-custodial — you sign, you
broadcast, we hold no key.