Sorts the two latitudes in the KQL layer so MinLat <= MaxLat. Only bleve
strictly requires it (it errors on an inverted box; OpenSearch tolerates it),
but doing it centrally keeps behaviour consistent across backends and the AST
easy to reason about. Longitude order is preserved so an antimeridian-crossing
box (minLon > maxLon) still works, which both backends handle identically.
Dominik Schmidt
e43fe13066