Version Diff

A compact per-key change view over a versioned series — the "trend rows" companion to the Timeline trajectory chart. Takes the same inputs (`source` + `orderBy` + `track` + `metricPath`, optional `hueBy`): it follows each tracked sub-resource across the ordered instances, aligns them by stable key, and emits one row per key with the (linked) label, the first value, a small autoscaled sparkline of the metric across the sequence, the latest value, and a total-change delta badge (latest − first). Ontology-neutral — values render raw and the sparkline scales to each series' own range. Where the Timeline chart shows the overall shape, VersionDiff breaks it down series by series.