export type TPrometheusRangeParams = {
    start: string;
    end: string;
    step: string;
};
/**
 * Converts a duration string like "30m", "2h", "7d" into start/end ISO timestamps
 * and a safe step value to ensure < 11k data points for Prometheus query_range.
 */
export declare const buildPrometheusRangeParams: (range?: string) => TPrometheusRangeParams;
