EvidenceSeriesMetricDefinition()Recursively generate a dictionary representation of the model, optionally specifying which fields to include or exclude.
histogram is reserved and rejected; the tag publishes what is accepted.
Entity selects what a type=count metric counts.
Only valid when type=count; defaults to MetricEntityRun. entity=feedback requires params.feedback_key and counts individual feedback records rather than runs.
Numerator and Denominator are required when type=ratio.
percentile p or histogram bucket_count