Retrieve comprehensive dashboard analytics including token usage, costs, messages, and recent activity
X-API-Key header.
1h, 6h, 24h, 7d, 30d1h, 6h, 24h7d, 30d24h range compares last 24 hours vs. previous 24 hours.1h, 6h, 24h return hourly timeseries. Ranges 7d, 30d return daily timeseries.DASHBOARD_CACHE_TTL_MS).