执行 Ruff 安全自动修复

web/backend/database.py

@@ -5,7 +5,7 @@ from pathlib import Path
 from urllib.parse import quote_plus
 
 from sqlalchemy import create_engine, event
-from sqlalchemy.orm import sessionmaker, declarative_base
+from sqlalchemy.orm import declarative_base, sessionmaker
 
 PROJECT_ROOT = Path(__file__).resolve().parents[2]
 
@@ -147,6 +147,7 @@ def _seed():
 def _encrypt_existing_sensitive_data():
     """启动时把历史明文敏感数据迁移为密文。"""
     from loguru import logger
+
     from .crypto_storage import encrypt_existing_sensitive_data
 
     changed = encrypt_existing_sensitive_data(engine)