fix: address security review findings

exec/lib/RemoteLoginUrlClient.php

@@ -10,7 +10,8 @@ final class LoginUrlRequest
         public readonly int $ttl,
         public readonly bool $userIpBound,
         public readonly string $clientIp,
-        public readonly string $redirectPath
+        public readonly string $redirectPath,
+        public readonly int $createdAt
     ) {
     }
 }
@@ -66,6 +67,7 @@ final class RemoteLoginUrlClient
             $request->userIpBound ? '1' : '0',
             $request->clientIp,
             $request->redirectPath,
+            (string)$request->createdAt,
         ];
     }