chore: add Metrics
in FlightMetadata
#134
Merged
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I hereby agree to the terms of the GreptimeDB CLA
What's changed and what's your intention?
This pr mainly adds a
Metrics
field inFlightMetadata
, allowing us to carry metrics from datanode to frontend. We usebytes
here for compatibility reason in case we want to change encoding later(currently in json/string).Checklist
Refer to a related PR or issue link (optional)