spans dataset inflates transaction metrics by 100-700x (child ops counted as roots)

Spans dataset inflates transaction metrics (child ops counted as roots): Spans dataset includes all child ops (db, cache.get, http.client, etc.) within each root transaction — naive count() is inflated 100-700x. transactions dataset deprecated May 2026 (is_transaction:true returns 0). Workaround: use widgetType:spans with explicit root transaction filter or error-events widgetType. Real Stripe Projects traffic: 33 transactions in 14d.