Raised by Localize.Inputs.Validator.validate_number/2 when
one or more business-rule checks fail (bounds, precision,
required).
Wraps a list of {kind, message} entries — one per failing
check. Localize.Inputs.Changeset.validate_number/3 unpacks
this list and converts each entry into an Ecto.Changeset
error with validation: kind metadata.