chore(lint): recognize Node performance global

Declare the runtime-provided performance API as read-only so the full release lint gate validates existing timing instrumentation without altering production behavior.

eslint.config.mjs

@@ -55,6 +55,7 @@ const nodeGlobals = {
   fetch: 'readonly',
   crypto: 'readonly',
   structuredClone: 'readonly',
+  performance: 'readonly',
 };
 
 export default [