feat: open FSSHTTP OneNote sections

src/onenote/fsshttpb/data-elements.ts

@@ -553,11 +553,14 @@ function parseObjectGroupData(
       context.limits.maxVectorBytes,
       'Object binary item size'
     );
+    const offset = body.offset;
+    const data = body.read(size);
     result = {
       kind: 'object',
       objectReferences,
       cellReferences,
-      data: body.read(size),
+      data,
+      dataReference: { source: body.bytes, offset, size },
     };
   } else if (header.type === FSSHTTP_OBJECT.objectGroupBlobReference) {
     result = {