{
  "experimental_changes": 244,
  "records_changed": 240,
  "early_wgs_relabels": 14,
  "historical_theme_relabels": 230,
  "route_count_before": 6427,
  "route_count_after": 6427,
  "routes_removed": 290,
  "routes_added": 290,
  "aggregate_journey_signatures_before": 165,
  "aggregate_journey_signatures_after": 185,
  "journey_signatures_with_changed_counts": 39,
  "governance": "Experimental branch only. Canonical 2,224 records remain unchanged."
}