Invoices: convert a dd/mm/yyyy date column (some not zero-padded) to ISO yyyy-mm-dd, other columns untouched

Invoices: convert a dd/mm/yyyy date column (some not zero-padded) to ISO yyyy-mm-dd, other columns untouched: a task in agent-harbor-tasks (Harbor dataset). fatture.csv: la colonna data è in gg/mm/aaaa (a volte senza zeri, tipo 3/4/2026). me la porti in AAAA-MM-GG? salva in fatture iso.csv, tutto…