What `api.vendor_spend_forecast` was built from: the horizon, the look-back window actually
Vendor spend forecast
What `api.vendor_spend_forecast` was built from: the horizon, the look-back window actually
used (shortened to the first accepted invoice where the history is younger than the look-back), the invoices and completed rounds behind each half, the monthly run-rate, how many invoices were left out for want of a currency conversion, and how many are still waiting on a decision and so in no figure.

