English version of data_visualization dataset.
- jsonl text fields (question/reference/rubrics) translated
- binary file contents (xlsx/csv/docx headers + cell values) translated
- file names + sheet names made self-consistent across jsonl and on-disk files
- output_type mapped to English
- Real data cell values (currency units, search-keyword examples, code labels) kept in Chinese so evaluation against the .xlsx data still works.
