* smp server: combine queue and message store into one class (WIP)
* keep deleted queue tombstones to prevent race conditions and errors when restoring
* move store log from server to store implementations
* STMQueueStore type class
* fix store closed when messages expired, handle store writing errors
* types
* version
* fix recovery from missing write journal, tests
* version
* .401
* stats for undelivered notifications
* logs, stats
* control port show ntf client IDs
* check that Ntf client is still current and that queue is not full, drop notifications otherwise
* prevent losing notifications when client is not current or queue full
* add log when no notifications, remove some logs
* reduce STM transaction
* revert version change
