obs-cross-compiling

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

• Third-party content exposure detected (high risk: 0.80). The skill's required workflow (ci/fetch-obs-sdk.sh and the SKILL.md CI steps) explicitly downloads OBS source from GitHub (https://github.com/obsproject/obs-studio/...) and uses those extracted headers in the build, so open/public third-party content is ingested and can materially influence build actions.