fix: auto-fix code issues (cron)

- 修复PEP8格式问题（行长度超过120字符）
- 修复类型注解（添加__init__和_get_db返回类型）
- 删除__pycache__缓存文件
- 优化长SQL查询语句格式

backend/enterprise_manager.py

@@ -1003,7 +1003,11 @@ class EnterpriseManager:
     def _generate_self_signed_cert(self) -> str:
         """生成自签名证书（简化实现）"""
         # 实际应该使用 cryptography 库生成
-        return "MIICpDCCAYwCCQDU+pQ4nEHXqzANBgkqhkiG9w0BAQsFADAUMRIwEAYDVQQDDAlsb2NhbGhvc3QwHhcNMjQwMTAxMDAwMDAwWhcNMjUwMTAxMDAwMDAwWjAUMRIwEAYDVQQDDAlsb2NhbGhvc3QwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC..."
+        return (
+            "MIICpDCCAYwCCQDU+pQ4nEHXqzANBgkqhkiG9w0BAQsFADAUMRIwEAYDVQQDDAlsb2NhbGhvc3Qw"
+            "HhcNMjQwMTAxMDAwMDAwWhcNMjUwMTAxMDAwMDAwWjAUMRIwEAYDVQQDDAlsb2NhbGhvc3QwggEi"
+            "MA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC..."
+        )
 
     # ==================== SCIM 用户目录同步 ====================