Extract the payslip header/total fields and the social contributions table. Désignation values are the French labels exactly as printed. Employee name excludes any honorific. Monetary and rate columns are numeric. Dates in YYYY-MM-DD. The earnings and contributions arrays are individual leaf lines only: exclude total/subtotal lines (e.g. Total Brut, Total des cotisations, sub-totals); those belong in the top-level total fields.
