fix: seed-admin route must not destroy shared payload pool

apps/cms/src/app/api/seed-admin/route.ts

@@ -18,7 +18,6 @@ export const POST = async () => {
   const payload = await getPayload({ config });
   const existing = await payload.find({ collection: "users", limit: 1, pagination: false });
   if (existing.totalDocs > 0) {
-    await payload.destroy();
     return Response.json({ ok: false, error: "user exists" }, { status: 409 });
   }
 
@@ -27,6 +26,5 @@ export const POST = async () => {
     data: { email, password, displayName: "CMS Admin" },
     overrideAccess: true,
   });
-  await payload.destroy();
   return Response.json({ ok: true });
 };