prepare-providers-documentation

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

• Third-party content exposure detected (medium risk: 0.30). The skill’s Phase 3 runtime workflow reads outsider-authored PR free text and diffs via gh pr view <NNNN> --json title,body,labels,files and gh pr diff <NNNN> -- 'providers/<provider-path>/**' for commits that are labeled needs_llm by Phase 1.