fix: 动态读取 MySQLSessionLocal，避免模块导入顺序导致迁移跳过

app/config_store.py

@@ -10,10 +10,18 @@ from typing import Optional
 
 from app.models import AppConfig
 from app.storage_manager import get_storage_manager
-from app.mysql_database import MySQLSessionLocal
 
 logger = logging.getLogger(__name__)
 
+
+def _get_mysql_session_local():
+    """动态读取 app.mysql_database.MySQLSessionLocal，避免模块导入顺序问题。"""
+    import sys
+    module = sys.modules.get("app.mysql_database")
+    if module is None:
+        return None
+    return getattr(module, "MySQLSessionLocal", None)
+
 CONFIG_DIR = Path(__file__).resolve().parent.parent / "config"
 CONFIG_FILES = {
     "symbols": CONFIG_DIR / "symbols_config.json",
@@ -47,12 +55,19 @@ class ConfigStore:
     ):
         self.storage_manager = storage_manager or get_storage_manager()
         self.config_dir = config_dir
-        self.session_maker = session_maker or MySQLSessionLocal
+        self._session_maker_override = session_maker
         self.config_files = {
             "symbols": self.config_dir / "symbols_config.json",
             "ai": self.config_dir / "ai_config.json",
         }
 
+    @property
+    def session_maker(self):
+        """动态读取 MySQLSessionLocal，避免初始化顺序问题。"""
+        if self._session_maker_override is not None:
+            return self._session_maker_override
+        return _get_mysql_session_local()
+
     def get_config(self, key: str, fallback: Optional[dict] = None) -> dict:
         """读取配置，优先从 MySQL，其次 JSON 文件。"""
         if key not in self.config_files: