Gate checks on the shape of the data, never on a list of units

The first attempt to quiet the jump check whitelisted percent/count/rate units. It worked, and it silently discarded Mauritius' food waste going 207 tonnes to 177,570 tonnes in one year, because WEIGHT_TN was not on the list — precisely what the check exists to find. Unit vocabularies are long, inconsistent and not ours to enumerate.

The durable test is a property of the values: does this indicator ever go negative anywhere? If so it has no meaningful zero and no ratio on it means anything. That one question replaced the whitelist and costs nothing to maintain.