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P2.6 接入 2026-04-24 ogt + Claude Sonnet 4.6
問題: trust_drift_detector.py 是孤立服務（零引用），Playbook 信任度
偏態（盲目樂觀/學習鎖死）從未被任何監控機制感知
修復: ai_slo_watchdog_job._check_once() 新增 W-6 Trust Drift 檢查
- 呼叫 get_trust_drift_detector().run()（偵測 + 寫 ai_governance_events）
- 偵測到偏態時加入 violations 清單 → 觸發 TYPE-8M Meta-System 告警
- checks 計數從 5 → 6
覆蓋案例:
- optimism_bias: >70% Playbook trust_score >0.9 → PostExecutionVerifier 可能失效
- confidence_collapse: >70% Playbook trust_score <0.3 → EWMA 計算/執行誤判
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>