KSQL January release: Streaming SQL for Apache Kafka

This release (KSQL 0.4) introduces several new features and improvements for ksqlDB. Key additions include an enhanced PRINT TOPIC command for data discovery, an improved SHOW TOPICS command to display consumer group information, and new aggregation functions TOPK and TOPKDISTINCT for advanced analytics. Operational improvements include the ability to print KSQL metrics from the command line and the availability of binary tarballs. Furthermore, the release highlights continued investment in distributed system tests for enhanced production readiness.