Following "OpenTelemetry to Zipkin Transformation", I set the annotation name, but I found that if event's attributes is empty, it is meaningless and inconvenient as attached. In this PR, if attributes is empty, the event name is used as the annotation name.
Following "OpenTelemetry to Zipkin Transformation", I set the annotation name, but I found that if event's attributes is empty, it is meaningless and inconvenient as attached. In this PR, if attributes is empty, the event name is used as the annotation name.