fix: restore the typeof check

src/utils/string.ts

@@ -4,7 +4,7 @@ import { strip0x } from '@hyperlane-xyz/utils';
 // Only allows letters and numbers
 const alphanumericRgex = /[^a-zA-Z0-9]/gi;
 export function sanitizeString(str: string) {
-  if (!str) return '';
+  if (!str || typeof str !== 'string') return '';
   return str.replaceAll(alphanumericRgex, '').toLowerCase();
 }