Properly expire idle transactions that consist of just the start transaction statement
and nothing else.
Fix possible deadlock in worker communication when task restart is detected.
Performance improvements for aggregations on dictionary encoded data.
This optimization is turned off by default. It can be configured via the
optimizer.dictionary-aggregation config property or the
dictionary_aggregation session property.
Fix race which could cause queries to fail when using concat() on
ARRAY, or when enabling columnar_processing_dictionary.
Add sticky headers and the ability to sort the tasks table on the query page
in the web interface.