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

scripts/stock_quote.py

@@ -44,9 +44,11 @@ def _http_get(url, headers=None, timeout=10):
 
 
 def _detect_market(code):
-    """自动识别A股/港股"""
+    """自动识别A股/港股
+    A股代码固定6位，港股代码5位（含前缀0如00700）。
+    """
     code = str(code).strip()
-    if code.startswith("0") or code.startswith("3") or len(code) == 6:
+    if len(code) == 6:
         return "ashare"
     if len(code) <= 5:
         return "hk"
@@ -337,10 +339,10 @@ def _sina_hk(code):
         return {
             "code": code,
             "name": name,
-            "price": price,
+            "price": round(prev_close + change_amt, 2) if prev_close > 0 and abs(change_amt) > 0 else price,
             "change_pct": change_pct,
-            "high": float(fields[5]) if fields[5] else None,
-            "low": float(fields[6]) if fields[6] else None,
+            "high": None,  # Sina HK format不含high/low字段
+            "low": None,
             "open": float(fields[4]) if fields[4] else None,
             "prev_close": prev_close,
             "volume": None,
@@ -366,7 +368,7 @@ def _tencent_hk(code):
         prev_close = float(fields[4]) if fields[4] else 0
         if price <= 0:
             return None
-        change_pct = float(fields[7]) if len(fields) > 7 and fields[7] else 0
+        change_pct = round((price - prev_close) / prev_close * 100, 2) if prev_close > 0 else None
         return {
             "code": code,
             "name": name,