Engine

• Added support for left outer join.
• Added support for select distinct.
• Fixed drop of unique keys.
• Added validation to grouping queries to ensure that expressions are either aggregated or included in the grouping.
• Added heartbeat manager to cleanup abandoned connections where they could not be instantly terminated due to locking.
• Resolved abandoned process thread deadlocks.

UI

• Migration tool status is no longer modal.

Full Changelog: https://github.com/NTDLS/Katzebase/compare/0.26.0...0.27.0