Function cli_client_id 

pub fn cli_client_id() -> ClientId

The memstead-cli@<version> client identity stamped into the commit body’s Client: provenance trailer. Shared by every CLI mutation path so the trailer is uniform across create / update / relate / rename. Un-gated (unlike cli_ctx_with_note) because the relate path passes the client to relate_entity directly rather than through a CommitContext, and that path compiles on both flavours.