Add Kafka transport

[araujof]

Indicate project Processor

Overview We want to enable Kafka transport in the SysFlow Processor, using our encoder/transport architecture as the base framework.

Tasks

• [x] Encoder
  • [ ] Add Avro serialization of SysFlow records
  • [x] Add serialization of Otel records
• [x] Transport
  • [ ] Add Kafka transport (for avro-, json-, and ecs- encoded records)
  • [x] Add Kafka transport for Otel records
• [ ] Tests
• [ ] Documentation

Additional context