fix(datasource): 支持US_STOCK和HK_STOCK类型数据获取

- universal_fetcher.py: 添加 _fetch_us_stock 和 _fetch_hk_stock 方法
- flask_server.py: SSH_HOST 修正为正确的IP地址 8.218.167.69
- 测试 META 获取成功，info 字段在最外层返回179个属性

.env

@@ -25,3 +25,15 @@ OSS_ACCESS_KEY_ID=LTAI5tKD9izrfbQNSVeu4NYd
 OSS_ACCESS_KEY_SECRET=Vif8FmvEat9qBA4EBbKnXhHvFQokdR
 OSS_BUCKET_NAME=value-investing
 OSS_ENDPOINT=https://oss-cn-wulanchabu.aliyuncs.com
+
+# ==================== SSH 隧道配置（港美股代理） ====================
+SSH_ENABLED=true
+SSH_HOST=8.218.167.69
+SSH_PORT=22
+SSH_USERNAME=root
+SSH_KEY_PATH=hk_ecs.pem
+SSH_LOCAL_PORT=1080
+
+# ==================== Flask 缓存配置 ====================
+CACHE_MAXSIZE=128
+CACHE_TTL_SECONDS=7200

datasource/universal_fetcher.py

@@ -135,8 +135,12 @@ class UniversalDataFetcher:
                     return self._fetch_china_etf(code, start_date, end_date)
                 elif asset_type == AssetType.US_INDEX:
                     return self._fetch_us_index(code, start_date, end_date)
+                elif asset_type == AssetType.US_STOCK:
+                    return self._fetch_us_stock(code, start_date, end_date)
                 elif asset_type == AssetType.HK_INDEX:
                     return self._fetch_hk_index(code, start_date, end_date)
+                elif asset_type == AssetType.HK_STOCK:
+                    return self._fetch_hk_stock(code, start_date, end_date)
                 elif asset_type == AssetType.FUTURES:
                     return self._fetch_futures(code, start_date, end_date)
                 elif asset_type == AssetType.CRYPTO:
@@ -262,6 +266,20 @@ class UniversalDataFetcher:
         self._start_tunnel()
         return self._yfinance.fetch(code, start_date, end_date)
     
+    def _fetch_us_stock(
+        self,
+        code: str,
+        start_date: str,
+        end_date: str
+    ) -> Optional[pd.DataFrame]:
+        """
+        获取美股股票
+        
+        特点：YFinance，需要SSH隧道，返回价格+股票信息
+        """
+        self._start_tunnel()
+        return self._yfinance.fetch(code, start_date, end_date)
+    
     def _fetch_hk_index(
         self,
         code: str,
@@ -276,6 +294,20 @@ class UniversalDataFetcher:
         self._start_tunnel()
         return self._yfinance.fetch(code, start_date, end_date)
     
+    def _fetch_hk_stock(
+        self,
+        code: str,
+        start_date: str,
+        end_date: str
+    ) -> Optional[pd.DataFrame]:
+        """
+        获取港股股票
+        
+        特点：YFinance，需要SSH隧道，返回价格+股票信息
+        """
+        self._start_tunnel()
+        return self._yfinance.fetch(code, start_date, end_date)
+    
     def _fetch_futures(
         self,
         code: str,