returns (CmdType, allow-updates-callback, err) we must persist the CmdType to the DB before calling the callback to allow updates otherwise an early CmdDone packet might not get processed (since cmd will not exist in DB).

after this limit we'll switch to persisting the full state.

we add this ping packet to the WaveshellServer Commands in order to deal with spurious SSH output basically we guarantee the parser will see a valid packet (either an init error or a ping) so we can pass ignoreUntilValid to PacketParser.

provides state, acccess, and control for a waveshell server process.