KSQL January release: Streaming SQL for Apache Kafka

What this post added

This post details the release of KSQL 0.4, introducing several new features and improvements. Key additions include enhanced `PRINT TOPIC` and `SHOW TOPICS` commands for data exploration, new aggregation functions `TOPK` and `TOPKDISTINCT` for analytics, and the ability to print KSQL metrics from the command line. It also announces the availability of binary tarballs and improvements in distributed failure testing for KSQL.