币种标记标准化 + data-pipeline诊断文档

stale_detector: HK股价格输出加(HKD)标记，防止LLM混读CNY/HKD
per_stock_reassess: 写回decisions.json的HK股加上currency: HKD
docs/data-pipeline-diagnosis.md: 完整数据管道重构需求文档

避免建滔积层板CNY/HKD错配类问题复发

scripts/per_stock_reassess.py

@@ -43,29 +43,23 @@ def main():
             try:
                 import urllib.request
                 code_raw = entry.get("code", "")
-                sym_map = {"6":"sh","5":"sh","0":"sz","3":"sz"}
-                prefix = ""
-                for k, v in sym_map.items():
-                    if code_raw.startswith(k):
-                        prefix = v
-                        break
+                # 港股5位代码（含0开头）→ 前缀hk
+                if len(code_raw) == 5 and code_raw[0] in '01':
+                    prefix = "hk"
+                else:
+                    sym_map = {"6":"sh","5":"sh","0":"sz","3":"sz"}
+                    for k, v in sym_map.items():
+                        if code_raw.startswith(k):
+                            prefix = v
+                            break
                 if not prefix:
-                    prefix = "hk" if len(code_raw) == 5 else "sz"
+                    prefix = "sz"
                 url = f"http://qt.gtimg.cn/q={prefix}{code_raw}"
                 resp = urllib.request.urlopen(url, timeout=5)
                 text = resp.read().decode("gbk")
                 fields = text.split('"')[1].split("~")
                 price = float(fields[3]) if fields[3] else 0
-                # 港股：腾讯API返回HKD，统一转CNY
-                if len(code_raw) == 5 and code_raw[0] in '01':
-                    try:
-                        sys.path.insert(0, '/home/hmo/MoFin')
-                        from hk_rate import hkd_to_cny
-                        _hkd_rate = hkd_to_cny()
-                    except Exception:
-                        _hkd_rate = 0.87
-                    price = round(price * _hkd_rate, 2)
-                print(f"  实时价: {price} {'(CNY)' if len(code_raw) == 5 and code_raw[0] in '01' else ''}")
+                print(f"  实时价: {price} {'(港股HKD)' if len(code_raw) == 5 and code_raw[0] in '01' else ''}")
             except Exception as e:
                 print(f"  实时价获取失败: {e}", file=sys.stderr)
                 # Try portfolio.json as fallback (price_monitor keeps live prices)
@@ -117,6 +111,8 @@ def main():
 
                 # 更新 decisions_map 中对应的条目
                 updated = entry.copy()
+                # 币种标记：HK股保留HKD原始值，A股为CNY
+                is_hk = len(str(code)) == 5 and str(code)[0] in '01'
                 updated.update({
                     "action": result["action"],
                     "stop_loss": result.get("stop_loss", entry.get("stop_loss")),
@@ -128,6 +124,7 @@ def main():
                     "rr_ratio": result.get("rr_ratio", entry.get("rr_ratio", 0)),
                     "status": result.get("status", "updated"),
                     "price": price,
+                    "currency": "HKD" if is_hk else "CNY",
                 })
                 # Save last reassessed price for debounce tracking
                 updated["last_reassessed_price"] = price