Multi-Currency Support

OPTIMAZE now holds a single account currency, and every financial figure in the platform is expressed in it. Billing arrives from AWS, Anthropic, GCP and the rest in whatever currency each provider invoices in, and until now a total spanning more than one of them was not a figure finance could use. Cross-integration totals now aggregate properly.

The conversion is deliberate rather than cosmetic. Where a bill arrives in the account currency it is used as it is, and where it does not it is converted at a fixed or market rate. Each line converts once, at ingest, and what gets stored alongside the source amount is the converted amount, the rate, the rate source, the rate date. The native bill is never rewritten, so the source currency survives for audit, and drill-down shows the working: the original amount, the converted amount, the rate applied.

This sits underneath everything financial rather than at the display layer, so budgets, goals, variance and exports are all in the account currency rather than being converted on the way to a screen.