fix: remove unnecessary null check for adId in ensureAdIdCounterAligned function

prisma/mongo/seed-ads.ts

@@ -118,7 +118,6 @@ function makeTimeWindow(): { startDt: bigint; expiryDt: bigint } {
  */
 async function ensureAdIdCounterAligned(adIdStart: number) {
   const maxRow = await prisma.ads.findFirst({
-    where: { adId: { not: null } },
     select: { adId: true },
     orderBy: { adId: 'desc' as any }, // Prisma Mongo sometimes needs 'as any' for orderBy on optional field
   });