Please add JavaDoc comments for the request classes under:
ai.docling.serve.api.convert.request

These classes contain important fields (e.g., doPictureDescription, imageExportMode, etc.) but currently have no documentation. Adding brief JavaDocs for each property (purpose, valid values, defaults) would make it much easier for Java developers to understand and use the API correctly. This helps Developers can understand request structures without having to keep checking the GitHub Markdown documentation