fix: service worker evaluation should use page-based waitForEventsAfterAction

Service worker evaluation was incorrectly skipping waitForEventsAfterAction
entirely. It should use the selected page's waitForEventsAfterAction helper
so that throttling settings are respected, while still being called via the
page-based McpPage method rather than the removed McpContext method.

Author: bcfmtolgahan

src/tools/script.ts

@@ -77,7 +77,9 @@ Example with arguments: \`(el) => {
         }
 
         const worker = await getWebWorker(context, serviceWorkerId);
-        await performEvaluation(worker, fnString, [], response);
+        await context.getSelectedMcpPage().waitForEventsAfterAction(async () => {
+          await performEvaluation(worker, fnString, [], response);
+        });
         return;
       }