branch-4.1: [fix](inverted index) Add a norms index property and a BE config to skip norms on variant paths - #68140

On November 2, 2026, GitHub will restrict `pull_request_target` on public repositories by default. To continue allowing the event trigger, configure an Actions policy. Learn more: https://gh.io/securely-using-pull_request_target#default-policy-for-pull_request_target