Module server 

russh server plumbing: pubkey auth against the tenancy registry + per-session handlers. Exec routes to the control-command router; shell serves the board TUI to enrolled keys over the channel (picker first when a key belongs to several tenants).

Structs

AppState

Shared server state: tenancy routing + signup policy.

ClibandServer

Connection factory handed to russh::server::Server::run_on_socket.

KeyInfo

The authenticated key for one connection, resolved at auth time.

SessionHandler

Per-connection handler.

Functions

russh_config

Build the russh server config around the persisted host key.