v.4.21.0

Improvements:

1. [LUNA-7416] Now in the json field event of the GeneralEvent table, the data of the fields: event_id, track_id, stream_id, source, location is not duplicated.

Bugs fixed:

1. [LUNA-7419] Fixed the issue with casting the user-defined event meta field values when using the count aggregator within event stats request.

Migration:

See a migration manual.