BR-CO-15 — Grand total off by a cent

One cent is enough to reject an invoice — and the penalty for a non-compliant French B2B invoice is levied on the sender.

• Reports the declared grand total, the recomputed one and the delta.
• Checks the whole chain in one pass: lines, VAT breakdown, total VAT, amount due.
• Emits the corrected artifact only when nothing blocks.