fix: use local form values for country/state in user.register telemetry event

Co-authored-by: cmaneu <790974+cmaneu@users.noreply.github.com>

Author: Copilot

frontend/src/pages/SignInPage.tsx

@@ -79,8 +79,8 @@ export default function SignInPage() {
           userId: user.userId,
           name: user.name,
           hasPhoneNumber: Boolean(phone),
-          country: user.country,
-          state: user.state
+          country,
+          state: state || null
         },
         {
           page: 'signin',