Core is no longer account-aware: the client resolves an account address
to signer ids via the account directory, and the signer's verifying-key
hex serves as registry key, inbox subscription, and Welcome routing
target end to end. The MLS credential stays the full id().
- GroupV2 reads the de-mls member id from the fetched key package and
maps it to the signer id the welcome is delivered to.
- All account machinery (directory trait, bundle codec, resolution)
moves out of core into logos-account; the RegistrationService
supertrait and Core::account_directory() are gone, and the client
holds its own directory handle.
- The account exposes functionality, never a signer: add_delegate_signer
does the lamport upsert and signs internally.
- Every client acts for an account (ChatClientBuilder::new(account)).
DelegateSigner is a pure keypair; the client composes the wire
credential from the signer and the account, so the association is
client state. addr() is the account address.
- resolve_device_ids fails fast (NotAnAccountKey / NoDeviceBundle /
Directory) instead of falling back to treating an unresolved address
as a signer id. LogosChatClient::open and chat-cli mint and publish a
dev account each launch.
- EphemeralRegistry keys key packages by hex pubkey like HttpRegistry.
Supersedes #155 (routing_id).
