Message queue: add a default worker monitor
Message queue: housekeeping (use keywords for keynames)
Message queue: housekeeping
Message queue: fix backoff ttl
Message queue: fix retry, backoff keys cleanup
Locks: housekeeping (use keywords for keynames)
Tundra: housekeeping (use keywords for keynames)
Tundra: fix conn defaults overriding given conn
Tundra: fix bad test setup fn
BREAKING: Ring middleware: remove :session-id key (use Ring's :session/key instead)
~WIP: Message queue: add support for message deduplication