fix async apis

app/db/models/systemconfig.py

@@ -1,7 +1,8 @@
-from sqlalchemy import Column, Integer, String, Sequence, JSON
+from sqlalchemy import Column, Integer, String, Sequence, JSON, select
+from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import Session
 
-from app.db import db_query, db_update, Base
+from app.db import db_query, db_update, Base, async_db_query
 
 
 class SystemConfig(Base):
@@ -19,6 +20,12 @@ class SystemConfig(Base):
     def get_by_key(cls, db: Session, key: str):
         return db.query(cls).filter(cls.key == key).first()
 
+    @classmethod
+    @async_db_query
+    async def async_get_by_key(cls, db: AsyncSession, key: str):
+        result = await db.execute(select(cls).where(cls.key == key))
+        return result.scalar_one_or_none()
+
     @db_update
     def delete_by_key(self, db: Session, key: str):
         systemconfig = self.get_by_key(db, key)