REFACTOR - Database logic

services/notification/app/main.py

@@ -70,8 +70,9 @@ async def lifespan(app: FastAPI):
         async def check_database():
             try:
                 from app.core.database import get_db
+                from sqlalchemy import text
                 async for db in get_db():
-                    await db.execute("SELECT 1")
+                    await db.execute(text("SELECT 1"))
                     return True
             except Exception as e:
                 return f"Database error: {e}"