Update reference.md

опечатка timeSeriesGroupSum -> timeSeriesGroupRateSum

Kafka retry commits on failure

Fix optimize_skip_unused_shards with virtual columns of the underlying table in WHERE

Better exception message for invalid pipeline

 Try to add better users_config.d explanation

Added performance test for the case of extremely slow analysis of array of tuples

Added setting "validate_polygons"

Some MemorySanitizer fixes

Date time various timezone fixes