Community Kafka / Redpanda EventEngine binding (since 0.7.0). Isolates kafka-clients (and its transitives — zstd-jni, lz4-java, snappy-java, jackson-databind) so single-node operators of exeris-kernel-community do NOT ship a Kafka client on their classpath. See ADR-008 (Open-Core boundary) and v0.7 EVENT-204.