modelopt-release-cherry-pick

MEDIUM W011: Third-party content exposure detected (indirect prompt injection risk).

• Third-party content exposure detected (medium risk: 0.30). The non-final-RC path runs gh search prs against NVIDIA/Model-Optimizer and reads each merged PR's title, body, labels, and linked context, and anyone outside the org can open a PR that enters that feed without the agent selecting it first.