* core: forward notifications about message processing (for iOS notifications)
* simplexmq
* the option to keep database key, to allow re-opening the database
* export new init with keepKey and reopen DB api
* stop remote ctrl when suspending chat
* ios: close/re-open db on suspend/activate
* allow activating chat without restoring (for NSE)
* update NSE to suspend/activate (does not work)
* simplexmq
* suspend chat and close database when last notification in the process is processed
* stop reading notifications on message markers
* replace async stream with cancellable concurrent queue
* better synchronization of app and NSE
* remove outside of task
* remove unused var
* whitespace
* more debug logging, handle cancelled read after dequeue
* comments
* more comments
