## New Package: eQuantic.Core.Eventing.Kafka

### Features
- KafkaEventPublisher - Publish events to Kafka topics
- KafkaEventSubscriber - Consume events from Kafka topics
- DI extensions: AddKafkaPublisher(), AddKafkaSubscriber()
- Message headers: EventType, EventId, OccurredAt
- Custom key selector for partitioning
- Integration tests with Testcontainers.Kafka