feat: 修复 AI 风险语义并隔离 Mock 数据

scripts/risk_historical_review.sql

@@ -0,0 +1,27 @@
+-- Task 6 Step 5: 只读历史数据评估报告
+-- 仅统计，不更新数据；未经人工确认不得批量重算或覆盖历史 risk_score/risk_level。
+
+WITH real_inspections AS (
+    SELECT
+        id,
+        risk_level,
+        risk_score,
+        detections
+    FROM inspection_records
+    WHERE ai_status = 'done'
+      AND (is_mock IS NULL OR is_mock = false)
+)
+SELECT
+    risk_level,
+    count(*) AS records,
+    count(*) FILTER (
+        WHERE EXISTS (
+            SELECT 1
+            FROM jsonb_array_elements(detections) AS d
+            WHERE d->>'class' = 'healthy'
+              AND COALESCE((d->>'confidence')::numeric, 0) >= 0.80
+        )
+    ) AS healthy_high_conf_records
+FROM real_inspections
+GROUP BY risk_level
+ORDER BY risk_level;