fix: 全线港股前缀修复 + 币种统一

per_stock_reassess.py:
  - 港股5位代码前缀优先（0开头不匹配sz）
  - 删除CNY转换，存Tencent原始HKD值
stale_push_wlin.py fetch_trend_data:
  - 港股5位代码前缀优先
strategy_review.py (x2):
  - 港股5位代码前缀优先
验证：
  建滔 price=97.2 HKD SL=94.62 HKD ✓
  腾讯 price=421.2 HKD SL=409.73 HKD ✓
  中芯H price=88.8 HKD SL=84.8 HKD ✓
  A股不受影响 ✓

data/stocks/300548.json

@@ -46,6 +46,11 @@
       "content": "• 长芯博创(300548) 281.99 — +4.49%强势+21.8%盈利，保护利润上移止损至265",
       "report_id": "cron_99c06255590a_2026-06-22_08-37-35"
     },
+    {
+      "time": "2026-06-30T08:55:46.632204",
+      "content": "• 博创科技(300548) 253.2(-3.4%) 浮盈+9%但放量回调，止损251需盯",
+      "report_id": "cron_99c06255590a_2026-06-30_08-40-17"
+    },
     {
       "time": "2026-06-02T13:56:05.495125",
       "content": "🔺**博创科技(300548)** | 236.72 +7.92% | 买入区230~235已确认站上，等回调建仓2%",
@@ -146,6 +151,16 @@
       "content": "**博创科技(300548)** 224.03(-0.43%) — 盘中从+3.8%暴跌至-0.43%(振幅超4%)收长上影，距弱撑220.89仅+1.4%。今日冲高回落疑似试盘失败，破则看209止损",
       "report_id": "cron_d42f2ce3b479_2026-06-12_20-09-22"
     },
+    {
+      "time": "2026-06-30T08:55:46.708460",
+      "content": "**A股概览：** 上周五系统大跌(-2.26%/-3.44%)后弱反弹，科创50领涨+4.61%带动半导体板块。中芯国际A(688981) +19.8%浮盈距目标+4.1%、中芯H(00981) +",
+      "report_id": "cron_d42f2ce3b479_2026-06-29_20-08-09"
+    },
+    {
+      "time": "2026-06-30T08:55:46.708460",
+      "content": "- 长芯博创300548 253.19 | 买入区241.53~253.61 **(现价在区上沿)**",
+      "report_id": "cron_d42f2ce3b479_2026-06-29_20-08-09"
+    },
     {
       "time": "2026-06-03T19:55:47.511174",
       "content": "💡 **建议调整：博创科技(300548) 建议238~248（理由：今日收盘244.90，大涨4.39%，日间波动238~253。原230~235已完全低于现价。两日从219→245大涨+12%，建",