硬性策略质量门禁 validate_strategy()

新增 STRATEGY_QUALITY_GATES 检查清单（9条红线）：
CRITICAL: 止损/止盈存在+>0, 买入区下沿<上沿
HIGH: 止损≤买入区, 买入推荐含RR≥1.5, 港股标currency=HKD
MEDIUM: signal短词, tech_snapshot含技术位

enforce_strategy_quality() 插在写入链的两处：
1. reassess_with_context() return前 → 单只重评必过
2. regenerate_all() for d in decisions: 写DB前 → 批量重评必过

不过的：status=review_needed, signal降级→信号不充分
不会写进DB/JSON，除非修复了CRITICAL问题

price_monitor.py

@@ -211,14 +211,14 @@ def refresh_data_prices():
 
     # 收集所有需要拉取的代码
     try:
-        pf = mo_data.read_portfolio()
+        pf = read_portfolio()
         for s in pf.get('holdings', []):
             all_codes.add(s['code'])
     except:
         pf = {"holdings": []}
 
     try:
-        wl = mo_data.read_watchlist()
+        wl = read_watchlist()
         for s in wl.get('stocks', []):
             all_codes.add(s['code'])
     except:
@@ -363,7 +363,7 @@ def _branch_alert_suffix(code, price, shares=0, cost=0):
 def _record_branch_trigger(code, branch_id, price):
     """记录分支触发事件（自成长：trigger_count+1）"""
     try:
-        raw = mo_data.read_decisions()
+        raw = read_decisions()
         for d in raw.get('decisions', []):
             if d.get('code') == code and d.get('strategy_tree',{}).get('branches'):
                 for b in d['strategy_tree']['branches']:
@@ -487,7 +487,7 @@ def run_once(round_label=""):
     _SCENARIO_CACHE = detect_scenario() if HAS_TREE else {}
     _BRANCH_CACHE = {}
     try:
-        raw = mo_data.read_decisions()
+        raw = read_decisions()
         for d in raw.get('decisions', []):
             tree = d.get('strategy_tree', {})
             if tree and tree.get('branches'):