Bugfixes:
- Fix InFlightTxCount become negative during split/merge
- Allow compatibility between non-stable versions of different applications
- Various stability improvements (segfault, handle balancer and boot queue events in StateInit, data race when reporting issue counters, memory leak in TRopeArena)
- CPU overutilization in case of numerous topic consumers
- Fix import multiple converted csv columns
- Fix mem table merge when writing over committed deltas in tablets
- Check errors during read_table_scan and export
- Throttle datashard log messages
Features:
- Enable ANSI settings for generic query
- DML logging
- Request unit trailing header for ScanQuery/ScanYql sctipts
- Grpc KV api
- Change default metering mode of topics to request units
- Pqv0 support on server side
- Allow to maintain unavailable nodes in tablets checker
- Allow to reboot unavailable node
- Add Lazy Histogram for grpc request