全数据路径审计修复：price_monitor HK股价不再转CNY

审计发现(2026-07-03 15:00 systematic audit):
1. price_monitor 港股仍转 CNY (line 255, 306) → 改为存 HKD 原值, currency=HKD
2. strategy_lifecycle 质量门禁检查 currency=CNY (line 88-91) → 改为接受 HKD/CNY
3. strategy_lifecycle 新建策略写 currency='CNY' (line 2299) → 改为按代码判断 HKD/CNY
4. stale_push_wlin 两处直接 json.load(open(decisions.json)) → 改为 read_decisions()
5. stale_push_wlin 直接 json.load(open(portfolio.json)) → 改为 read_portfolio()
6. DB holdings/holding_strategies: 8只HK股currency从CNY改为HKD
7. calc_total_mv 增加港股HKD→CNY汇兑计算

验证:
- 建滔 84.45 HKD 浮亏-4.3%（不是-24%）
- 现金 132,121.93 总资产 953,295
- 所有8只HK股DB正确标记HKD
- price_monitor已重启，下个tick用新逻辑写HKD原值
- stale_push_wlin已换用mo_data读DB

data/price_history.json

@@ -26,7 +26,7 @@
       "date": "2026-07-03",
       "high": 1215.52,
       "low": 1185.0,
-      "close": 1195.45
+      "close": 1194.45
     }
   ],
   "02202": [
@@ -62,7 +62,7 @@
       "date": "2026-07-03",
       "high": 50.2,
       "low": 48.31,
-      "close": 49.06
+      "close": 49.09
     }
   ],
   "02359": [
@@ -118,7 +118,7 @@
       "date": "2026-07-03",
       "high": 502.0,
       "low": 444.55,
-      "close": 482.68
+      "close": 480.32
     }
   ],
   "06160": [
@@ -154,7 +154,7 @@
       "date": "2026-07-03",
       "high": 687.04,
       "low": 633.01,
-      "close": 644.5
+      "close": 643.81
     }
   ],
   "09868": [
@@ -196,7 +196,7 @@
       "date": "2026-07-03",
       "high": 757.88,
       "low": 713.0,
-      "close": 738.2
+      "close": 738.38
     }
   ],
   "300124": [
@@ -210,7 +210,7 @@
       "date": "2026-07-03",
       "high": 74.63,
       "low": 67.31,
-      "close": 72.22
+      "close": 72.15
     }
   ],
   "000657": [
@@ -224,7 +224,7 @@
       "date": "2026-07-03",
       "high": 101.5,
       "low": 87.88,
-      "close": 90.33
+      "close": 89.63
     }
   ],
   "000711": [
@@ -252,7 +252,7 @@
       "date": "2026-07-03",
       "high": 892.1,
       "low": 795.0,
-      "close": 882.5
+      "close": 881.91
     }
   ],
   "002594": [
@@ -264,9 +264,9 @@
     },
     {
       "date": "2026-07-03",
-      "high": 88.78,
+      "high": 88.88,
       "low": 81.9,
-      "close": 88.72
+      "close": 88.47
     }
   ],
   "00700": [
@@ -334,7 +334,7 @@
       "date": "2026-07-03",
       "high": 646.85,
       "low": 574.1,
-      "close": 620.31
+      "close": 618.02
     }
   ]
 }