* Each handler has an immutable GUID id and Messages are routed on a per handler basis. * Use bitflag field to track which handlers of an event/command have been invoked. (v)char to enable arbitrary number of handlers * A separate table maps bitflags per concrete message type to handler guid and is loaded on startup * We get delivery tracking per handler * but still only one row updated on commit meaning no loss of performance or scalability * Handlers can now be moved to have their own queue without having to be repopulated
