`mqtt-kafka` feature (enhanced)

[jfallows]

MQTT v5 specification MQTT v3.1.1 specification

Enhanced

• binding-kafka
  • [x] https://github.com/aklivity/zilla/issues/462
• binding-mqtt handles network protocol, abstracting differences between v5 and v3.1.1
  • [x] https://github.com/aklivity/zilla/issues/541
  • [ ] https://github.com/aklivity/zilla/issues/421
  • [x] https://github.com/aklivity/zilla/issues/282
  • [ ] security guard integration via AUTH packet, expiration and challenge-response via $SYS/auth/challenge
  • [ ] support quic transport
• binding-mqtt-kafka handles the mapping
  • [x] https://github.com/aklivity/zilla/issues/426
  • [x] https://github.com/aklivity/zilla/issues/427
  • [x] https://github.com/aklivity/zilla/issues/602
  • [x] https://github.com/aklivity/zilla/issues/603
  • [x] https://github.com/aklivity/zilla/issues/604
  • [x] https://github.com/aklivity/zilla/issues/677
  • [x] https://github.com/aklivity/zilla/issues/631
  • [ ] shared subscriptions use tiered consumer group members
    • system consumer group member reads messages from topic partition
    • system consumer group members redistributed across zilla instances
    • virtual consumer group members read messages with same key to support consistent ordering per key
    • virtual consumer group members redistributed within same zilla instance
    • detach system consumer group member instance when no remaining virtual members to avoid delivery starvation