Critical fixes: Cache busting + Remove throttling + Ensure correct defaults

1. Browser Cache Fix:
   - Added ?v=4.0 to main.js to force browser reload
   - This ensures new comparison/waterfall UI loads

2. Remove ALL Throttling:
   - Disabled Lighthouse network throttling (rttMs=0, throughput=0)
   - Disabled CPU throttling (cpuSlowdownMultiplier=1)
   - Set throttlingMethod to 'provided' (no simulation)
   - Applies to both mobile and desktop tests

3. Backend Default Already Fixed:
   - isMobile defaults to false (desktop) matching frontend

This fixes all 3 reported issues

index.html

@@ -157,7 +157,10 @@
         </footer>
     </div>
 
-    <script src="main.js"></script>
+    <!-- Git Badge Scripts global must be before main -->
+    <script src="git-badge.js"></script>
+    <script src="breakdown.js"></script>
+    <script src="main.js?v=4.0"></script>
 </body>
 
 </html>