Backend: more tweaks to lastSent email fallback

Author: azdak

apps/backend/routes/internal/processScheduledAuditEmails.ts

@@ -66,9 +66,9 @@ export const processScheduledAuditEmails = async () => {
       subscriptionsCount++;
       // Ignore stale lastSent dates from before emails were enabled in prod
       const emailEnabledDate = DateTime.fromISO("2026-02-19T00:00:00.000Z");
-      const rawLastSent = DateTime.fromISO(email.lastSent);
+      const rawLastSent = email.lastSent ? DateTime.fromISO(email.lastSent) : emailEnabledDate;
       console.log(rawLastSent);
-      const lastSent = (rawLastSent < emailEnabledDate) || !rawLastSent ? emailEnabledDate : rawLastSent;
+      const lastSent = (rawLastSent < emailEnabledDate) ? emailEnabledDate : rawLastSent;
       let intervalDays = null;
       switch (email.frequency.toLowerCase()) {
         case "daily":