Before version 3.0, Loki was storing OpenTelemetry logs as JSON messages including the log body, the log fields
(spanID, traceID, severity...), the log attributes, and the resource attributes.
Starting from version 3.0, Loki stores OpenTelemetry logs sent to its native OTLP endpoint using labels and
structured metadata for the log fields, attributes, and resource attributes (more details in Loki OpenTelemetry docs ).
Indicate the format of the logs stored in Loki to adapt the LogQL queries generated by the Jenkins OpenTelemetry
plugin.