GitHub Ocean always fetches full file content for the file kind, even when a mapping only needs metadata like path or existence. This causes HTTP 413 errors on large files, since the full content is pulled and batched regardless of what's actually mapped. Add an option to fetch file metadata without content, so kinds don't fail on large files when content was never needed. For example, detecting package manager files like package-lock.json or yarn.lock only needs the file to exist, not its content.