[2026-10-01 18:52:24] production.INFO: CSV import started {"session_id":"csv_import_6abe2d5843b0c2.78893482","user_id":110,"user_name":"unknown","ip_address":"126.73.243.21","user_agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.36 Edg/154.0.0.0","import_config":{"table":"products","mode":"update","total_rows":76,"mapping":{"product_code":"商品コード","list_price":"上代"}},"file_info":{"name":"上代漏れ更新.csv","size":1063,"path":"csv_imports/bUnZfPlZb9KrjqplHN33GbUUNQH8CCVtU2xzOo7i.csv"},"performance":{"start_time":"2026-10-01 18:52:24","start_memory_mb":10.0},"timestamp":"2026-10-01T09:52:24.285697Z","component":"csv_import"} 
[2026-10-01 18:52:24] production.INFO: CSV import completed {"session_id":"csv_import_6abe2d5843b0c2.78893482","user_id":110,"user_name":"unknown","ip_address":"126.73.243.21","user_agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.36 Edg/154.0.0.0","result":{"import_id":1006,"success":true,"total_rows":76,"processed_rows":76,"success_rows":76,"error_rows":0,"warning_rows":0,"has_error_file":false},"performance":{"execution_time_seconds":0.385,"start_memory_mb":10.0,"end_memory_mb":16.0,"peak_memory_mb":16.0,"memory_increase_mb":6.0},"timestamp":"2026-10-01T09:52:24.662292Z","component":"csv_import"}