[codex] Reduce PR fallback report noise

[direct41]

Summary

• Align PR summaries with merge-triage test-first actions, including unchanged findings that still require review.
• Limit full-fallback merge triage scoring and top report sections to changed-file/PR-scoped findings.
• Keep full detailed findings visible while marking how many detailed findings were listed outside triage focus.

Validation

• .venv/bin/ruff check src tests scripts
• .venv/bin/mypy src
• PATH=/Library/Developer/CommandLineTools/usr/bin:$PATH .venv/bin/python scripts/check_public_artifacts.py
• .venv/bin/python -m pytest --cov=ai_risk_manager --cov-fail-under=80
• Manual smoke: review-pr fix: handle Infinity/NaN maxAge in res.cookie() without crashing expressjs/express#7287

[chatgpt-codex-connector]

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[github-actions]

AI Risk Manager

• Decision: ready
• Headline: No active release-risk action detected for the current scope.
• Risk score: 0/100
• Scope: impacted
• Changed files: 8
• PR delta: new=0, resolved=2, unchanged=0
• Support: l2 / supported / ci=advisory
• Profiles: code_risk:supported, ui_flow_risk:not_applicable, business_invariant_risk:not_applicable

Why Review

• No findings survived evidence, policy, suppression, and confidence filters.

Top Risks

No findings in current PR scope.

Test First

No immediate test-first action required.

Full details: see pr_summary.json, merge_triage.md, report.md, findings.json, and test_plan.json.