Function getNextScheduleEpoch

getNextScheduleEpoch(
    pattern: string,
    anchorMs: number,
    timeZone?: string,
): number | null
Polymorphically computes the next occurrence epoch timestamp (in milliseconds) for a schedule expression (Cron pattern or RRULE string).
Parameters
- pattern: string
  The schedule pattern (5-field Cron or RFC 5545 RRULE)
- anchorMs: number
  The starting anchor timestamp in epoch milliseconds
- timeZone: string = 'UTC'
  The IANA time zone identifier for Cron patterns (defaults to UTC)
Returns number | null
Next epoch timestamp in milliseconds, or null if no future occurrences exist

Remarks
RRULE strings are evaluated in UTC because getNextRRuleEpoch does not accept a timeZone, while timeZone is applied only to Cron patterns.
- Defined in packages/library/src/common/scheduling/schedule.library.ts:25