[2026-01-09 19:34:47] production.INFO: CSV import started {"session_id":"csv_import_6960d9c7049703.65864314","user_id":0,"user_name":"unknown","ip_address":"211.19.31.78","user_agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36","import_config":{"table":"users","mode":"insert","total_rows":4,"mapping":{"user_code":"社員コード","family_name":"姓","given_name":"名","name_kana":"氏名（カナ）","email":"ログインID(E-mail)","password":"パスワード","department_name":"部門名","warehouse_code":"拠点コード","position_name":"役職名","role_name":"権限名","is_sales_user":"営業担当者フラグ","is_active":"有効フラグ","mobile_phone_number":"携帯電話番号","work_phone_number":"勤務先電話","password_change_required":"パスワード変更必須フラグ","two_factor_enabled":"二要素認証有効フラグ","note":"備考"}},"file_info":{"name":"社員マスタ20260105.csv","size":624,"path":"csv_imports/vLCBlITZTF36QVYOJkY9sYRgTPfpbu3LEufjyagY.csv"},"performance":{"start_time":"2026-01-09 19:34:47","start_memory_mb":26.0},"timestamp":"2026-01-09T10:34:47.031498Z","component":"csv_import"} 
[2026-01-09 19:34:47] production.INFO: CSV import completed {"session_id":"csv_import_6960d9c7049703.65864314","user_id":0,"user_name":"unknown","ip_address":"211.19.31.78","user_agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36","result":{"import_id":3,"success":true,"total_rows":4,"processed_rows":4,"success_rows":4,"error_rows":0,"warning_rows":0,"has_error_file":false},"performance":{"execution_time_seconds":0.052,"start_memory_mb":26.0,"end_memory_mb":30.0,"peak_memory_mb":30.0,"memory_increase_mb":4.0},"timestamp":"2026-01-09T10:34:47.070617Z","component":"csv_import"}