sometimes a client will subscribe but the message it was hoping for is
already published and delivered to one of its peers but it missed it.
this adds a five second (default) buffer and will deliver buffered
messages to new subscribers. messages are removed from the buffer after
5 seconds
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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* integration tests used to use the samples - now they are separate
* patch dictionary problem in serializer
* add Message Registry with dead letter queue that gets checked on new
subs.