Add automatic inference from a Kafka topic

[aalkilani]

ForestFlow's core doesn't care what the source of inference requests is. It's built this way specifically to enable support for additional interfaces. As it is today, there's support for a basic HTTP REST API in addition to Graphpipe clients.
We'd like to add support for records coming from Kafka topics but lay this out in a way that we can easily extend support for other queuing systems like Faktory or Pulsar, or even an S3 or file-system watcher etc... This ticket will focus on Kafka first since it's already something ForestFlow integrates with for inference logging.