Do Flink checkpoints contain the entirety of in-flight state? This line in the doc confuses me https://flink.apache.org/2021/01/18/using-rocksdb-state-backend-in-apache-flink-when-and-how/#state-in-flink I was thinking in-flight state and what gets checkpointed are separate in that checkpoints are just data related to failure resiliency and EXACTLY_ONCE processing, but now I'm wondering if I am wrong and the checkpoints also contain stuff like the data being aggregated.