Generate an executive software quality report narrative.

Execution Summary:
- Total tests: {total_tests}
- Passed: {passed}
- Failed: {failed}

Bug Summary:
- Critical: {critical_bugs}
- High: {high_bugs}
- Medium: {medium_bugs}
- Low: {low_bugs}

Bug Clusters: {cluster_summary}

Release Decision (already determined): {decision}

Write a 2-3 sentence executive recommendation_text explaining the release decision in plain business language.
Also provide a risk_score from 0-100 (0=no risk, 100=critical risk).
Also provide a confidence_score for this report (0.0 to 1.0).

Return a JSON object with: recommendation_text, risk_score, confidence_score
Return ONLY valid JSON, no markdown.
