Derive the constraint-hint descriptor for a field at inputId. Returns
undefined when the field has no constraint worth announcing — callers
skip rendering the <small> element entirely rather than emitting an
empty node.
Shares its text builder with html/a11y.ts so the two renderers
always announce the same constraint copy for the same schema field.
Derive the constraint-hint descriptor for a field at
inputId. Returnsundefinedwhen the field has no constraint worth announcing — callers skip rendering the<small>element entirely rather than emitting an empty node.Shares its text builder with
html/a11y.tsso the two renderers always announce the same constraint copy for the same schema field.