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1/**
2 * Format cron timestamp (epoch ms) to ISO string
3 *
4 * @example
5 * formatTimestamp(1737553800000) // "2026-01-22T14:30:00.000Z"
6 *
7 * @param cronTimestamp - Epoch timestamp in milliseconds
8 * @returns Formatted timestamp string to ISO string
9 */
10export function formatTimestamp(cronTimestamp: number): string {
11 if (!cronTimestamp || !Number.isFinite(cronTimestamp)) {
12 return "Unknown";
13 }
14
15 const date = new Date(cronTimestamp);
16
17 if (Number.isNaN(date.getTime())) {
18 return "Unknown";
19 }
20
21 return date.toISOString();
22}