Add distribution and action scoping to Cargo tokens - #63

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

Failed to save: Unable to reserve cache with key setup-uv-2-x86_64-unknown-linux-gnu-ubuntu-24.04-3.14.8-pruned-949b9470c8579ca23a5743574ac9ead946e406b80cf539287824d36f13e2c120, another job may be creating this cache.

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