全数据路径审计修复完成：所有脚本从DB读数据

最终修复:
1. price_monitor: HK股存HKD原值, currency=HKD (移除x0.87转换)
2. strategy_lifecycle: 质量门禁currency=CNY→HKD/CNY均可
3. strategy_lifecycle: 新建策略currency动态判断
4. stale_push_wlin: 所有read_decisions()+read_portfolio()替代json.load
5. stale_detector: read_portfolio()替代json.load(PORTFOLIO_PATH)
6. per_stock_reassess: json.dump(decisions.json)→mo_data写入
7. DB holdings/holding_strategies: 8只HK股currency=HKD,价格修正
8. 建滔84.45 HKD浮亏-4.3%（之前报-24%）
9. 现金132,121.93总资产953,295
10. LLM cron prompts已改为全部从mo_data读

scripts/stale_detector.py

@@ -115,8 +115,7 @@ def main():
     cash = 0
     total_assets = 0
     try:
-        with open(PORTFOLIO_PATH) as f:
-            pf = json.load(f)
+        pf = read_portfolio()
         position_pct = pf.get("position_pct", 0)
         cash = pf.get("cash", 0)
         total_assets = pf.get("total_assets", 0)

scripts/stale_push_wlin.py

@@ -225,15 +225,11 @@ def trigger_regen_sync(stock_codes=None):
 
 
 def load_cash():
-    """从 portfolio.json 实时读可用现金（可用 ≈ 实时买力），不硬编码"""
+    """从 mo_data 实时读可用现金"""
     try:
-        with open(PORTFOLIO_PATH) as f:
-            data = json.load(f)
-        if isinstance(data, dict):
-            # 先读 cash_available（拆分了可用/冻结），fallback 到 cash
-            return data.get("cash_available", data.get("cash", 0))
-        if isinstance(data, list) and len(data) > 1 and isinstance(data[1], dict):
-            return data[1].get("cash_available", data[1].get("cash", 0))
+        pf = read_portfolio()
+        if isinstance(pf, dict):
+            return pf.get("cash_available", pf.get("cash", 0))
         return 0
     except Exception:
         return 0