Fix extension event test for branded names

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: TheLarkInn

libraries/reporter/src/test/Session.test.ts

@@ -106,7 +106,7 @@ describe('createScopedReporter', () => {
   it('validates and wraps extension events, rejecting non-namespaced names', () => {
     const sink: CapturingSink = new CapturingSink();
     const reporter: IScopedReporter = createScopedReporter({ sink, sessionId: 'sess', source: SOURCE });
-    reporter.emitExtension('acme.cache-warmed', { hits: 3 });
+    reporter.emitExtension('acme.cache-warmed' as Parameters<IScopedReporter['emitExtension']>[0], { hits: 3 });
     expect(sink.inputs[0].type).toBe('extension');
     expect(sink.inputs[0].payload).toEqual({ name: 'acme.cache-warmed', payload: { hits: 3 } });
     expect(() => reporter.emitExtension('notnamespaced' as Parameters<IScopedReporter['emitExtension']>[0], {})).toThrow(