Get a realtime traffic snapshot

Returns a compact snapshot of traffic over Umami's trailing 30-minute realtime window: total page views, distinct visitors, tracked custom events, and distinct countries, plus the snapshot timestamp. The visitor total is not directly comparable to the removed active endpoint's five-minute count. Use it to see recent activity; use the query endpoint for historical ranges. Requires a plan that includes analytics (403 otherwise); all-zero totals until the website is published and has traffic.