// PushTelemetryRequest, part of KIP-714, is a client side push of metrics.
PushTelemetryRequest => key 72, max version 0, flexible v0+
  // Unique ID for this client instance.
  ClientInstanceID: uuid
  // The unique identifier for the current subscription.
  SubscriptionID: int32
  // If the client is terminating the connection.
  Terminating: bool
  // Compression codec used to compress the metrics.
  CompressionType: int8
  // Metrics encoded in OpenTelemetry MetricsData v1 protobuf format.
  Metrics: bytes

PushTelemetryResponse =>
  ThrottleMillis
  ErrorCode: int16
