Function validate

scripts/aibridgepricesgen/main.go:178–185

validate checks invariants on the converted rows. Catches upstream changes that produce structurally valid but semantically broken seed data, e.g. a renamed `cost` key that leaves every row with all-null prices.

(rows []priceRow)

// data, e.g. a renamed `cost` key that leaves every row with all-null
// prices.
func validate(rows []priceRow) error {
	for _, r := range rows {
		if r.InputPrice != nil || r.OutputPrice != nil {
			return nil
		}
	}
	return xerrors.New("converted rows have no pricing data; upstream schema may have changed")
}

// toMicros scales a price into integer micro-units (1 unit = 1,000,000),
// rounding to avoid float-truncation errors. Returns nil for nil input, and