update-app-polling - Fix anonymous notification polling 401 spam.

[chadpalmer]

Summary

• Prevents unauthenticated pages from loading the notification polling script.
• Stops the login screen from repeatedly calling /api/notifications/count after idle timeout or before sign-in.
• Updates version, release notes, and notification polling regression coverage.

Validation

• git diff --check
• python -m py_compile application/single_app/config.py functional_tests/test_notification_polling_redirect_guard.py ui_tests/test_notifications_polling_redirect_guard.py
• python -m compileall -q application/single_app
• python scripts/check_xss_sinks.py --full-file application/single_app/templates/base.html
• pytest functional_tests/test_notification_polling_redirect_guard.py

Notes

• Local UI test execution was blocked because the environment did not provide the playwright pytest fixture.

[chadpalmer]

@Bionic711 @paullizer This PR turns off polling for unauthenticated users to prevent 401 error log spamming when users get logged out due to idle timeout or load the app page without signing in. Please let me know if you need any updates from me.

[Bionic711]

This be like some kind of crazy talk. Why on Earth would you not want you app insights and console logs filled with 401 spam? That is what separates the chaff from the real admins!

Will review tomorrow.