/**
 * Hourly gate for the email sent-copy sweep inside the 60-second heartbeat.
 *
 * The sweep opens an IMAP connection per mailbox, which is affordable hourly
 * and not per minute. Mirrors the provisioning-heartbeat gate in
 * connector-sync-provision.ts rather than inventing a second pattern.
 */
export interface SentSweepState {
    lastRunMs: number;
}
export declare const SENT_SWEEP_INTERVAL_MS: number;
export declare function shouldRunSentSweep(prev: SentSweepState | undefined, nowMs: number, intervalMs: number): boolean;
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