Function dispatch 

pub fn dispatch(
    doc: &mut AutoCommit,
    action: &dyn Action,
    encoded: EncodedAction,
    transport: &mut dyn ActionTransport,
) -> Result<Dispatched, ActionError>

The locus-aware front door, routing action per its ExecutionLocus: ClientLocal → apply_local then transport.replicate; ServerPreferred → transport.submit_to_host, refusing when no authoritative host is reachable. The envelope’s id/timestamp are fixed before submission.

Errors

See apply_local.