Function retentionCutoff

telemetry-worker/src/rollup.ts:58–60

(atMs: number, keepDays: number)

/** Oldest day kept: everything strictly before this is purged. */
export function retentionCutoff(atMs: number, keepDays: number): string {
  return utcDay(atMs - keepDays * DAY_MS);
}

// ---------------------------------------------------------------------------
// The rollup statements