fix(load-tests): replace JSON import with k6 open() in baseline.js

Author: CAESARIAN-ATHENS

load-tests/utils/baseline.js

@@ -5,7 +5,8 @@
 // configured tolerance). Returned data is embedded in the generated report and
 // printed to stdout so CI surfaces regressions even when raw thresholds pass.
 
-import baseline from '../baseline.json';
+// k6 does not support ES module JSON imports — use the built-in open() instead.
+const baseline = JSON.parse(open('../baseline.json'));
 
 function pct(measured, base) {
   if (base === 0) return measured === 0 ? 0 : 100;