At the moment, the producers (KafkaTemplate) and consumers (KafkaListener) are not configured to propagate the tracing context.

This is done on purpose by the Spring team (the default value for `observation-enabled` is false).

Therefore, we need to enable this property and ensure the tracing context is now propagated between spring boot services and also with quarkus services.

Acceptance Criteria

• Configure Spring Boot services to enable observation in Kafka
• Write a playbook to test the integration between spring boot and quarkus services (one integration is enough for this task)