fix: auto-fix code issues (cron)

- 修复缺失导入: main.py 添加 AttributeTemplate 和 EntityAttribute 导入
- 修复裸异常捕获: 将 BaseException 改为具体异常类型
  - neo4j_manager.py: Exception
  - main.py: json.JSONDecodeError, ValueError, Exception
  - export_manager.py: AttributeError, TypeError, ValueError
  - localization_manager.py: ValueError, AttributeError
  - performance_manager.py: TypeError, ValueError
  - plugin_manager.py: OSError, IOError
- 修复部分行长度问题: security_manager.py 长行拆分

backend/security_manager.py

@@ -297,9 +297,12 @@ class SecurityManager:
         """)
 
         # 创建索引
-        cursor.execute("CREATE INDEX IF NOT EXISTS idx_audit_logs_user ON audit_logs(user_id)")
         cursor.execute(
-            "CREATE INDEX IF NOT EXISTS idx_audit_logs_resource ON audit_logs(resource_type, resource_id)"
+            "CREATE INDEX IF NOT EXISTS idx_audit_logs_user ON audit_logs(user_id)"
+        )
+        cursor.execute(
+            "CREATE INDEX IF NOT EXISTS idx_audit_logs_resource "
+            "ON audit_logs(resource_type, resource_id)"
         )
         cursor.execute(
             "CREATE INDEX IF NOT EXISTS idx_audit_logs_action ON audit_logs(action_type)"