/**
 * Clean up inactive boards that have not been touched/updated in the last 30 days.
 * Cascades to delete all associated columns and tickets.
 */
export declare function cleanupInactiveBoards(daysInactive?: number): Promise<number>;
/**
 * Schedule periodic TTL cleanup in the server process (runs every 24 hours).
 */
export declare function startTtlCleanupSchedule(intervalHours?: number): NodeJS.Timeout;