* `AirbyteEstimateTraceMessage` * Add PR number * fix method name * Lint * Lint * fix merge * Update docs/understanding-airbyte/airbyte-protocol.md Co-authored-by: Davin Chia <davinchia@gmail.com> * `EstimateType` sub type in python * lint Co-authored-by: Davin Chia <davinchia@gmail.com>