Secures content-app headers consistently. - #8325

On December 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

Failed to save: Unable to reserve cache with key setup-uv-2-x86_64-unknown-linux-gnu-ubuntu-26.04-3.14.10-pruned-0eb40d89d9cc18650460307a02ea4d09c0d275bf25259c2d50da467b2ced3a75, another job may be creating this cache.

Cache reservation failed: cache write denied: token has no writable scopes