applyUdaFacets

Fold the constraint-facet UDAs from a compile-time sequence (e.g. __traits(getAttributes, someSymbol)) onto an existing schema node: @minimum, @maximum, @pattern, @minLength, @maxLength, @minItems, @maxItems, @format, @title, and @schemaDefault map to the matching keyword; any other UDA is ignored.

jsonSchemaOf uses this for struct fields, but it is public so external code can apply the same facets to symbols that are not struct fields — e.g. function parameters — without duplicating the mapping:

JsonNode prop = jsonSchemaOf!int;
applyUdaFacets!(__traits(getAttributes, someSymbol))(prop); // folds @minimum etc. onto prop