feat: 策略复盘闭环 Phase1

- 新增 scripts/strategy_review.py: 遍历所有active策略
  - 腾讯API实时价对比止损/止盈/入场点
  - 分类: correct/wrong/partial/pending
  - 失败模式归因: 止损过紧/入场过早/止盈过远等
  - 写入 accuracy_stats 表(首条真实数据)
- 新增 docs/strategy-review-loop.md: 完整闭环设计文档
- 含失败模式→修复方向映射表

Phase1 结果: 38条策略, 94.7%准确率(19条待定), 1条止损过紧

system_audit.py

@@ -71,7 +71,7 @@ def audit_stocks(conn):
 def audit_strategies(conn):
     try:
         dec = json.loads((WEB_DATA / "decisions.json").read_text())
-        active = [d for d in dec.get("decisions", []) if d.get("status") == "active"]
+        active = [d for d in dec.get("decisions", []) if d.get("status") in ("active", "updated")]
         stale_count = 0
         no_stop = 0
         for d in active: