docs: record FSSHTTP package-store support

CHANGELOG.md

@@ -8,6 +8,9 @@
 - Add a worker-hosted native TypeScript parser for a desktop OneNote
   revision-store subset: bounded file-node and object-space traversal,
   property sets, page metadata, titles, timestamps, levels, and plain text.
+- Add bounded FSSHTTPB packaging, storage-index/cell/revision/object-group
+  parsing and open unfragmented package-store `.one` sections through the same
+  content model.
 - Add in-memory CAB enumeration and extraction for uncompressed, MSZIP,
   Quantum, and LZX folders, including checksums, strict paths, explicit
   resource limits, and cooperative cancellation between data blocks.
@@ -21,6 +24,5 @@
 - Add deterministic static release packaging, SHA-256 sidecars, pinned-source
   provenance, fixture licensing, and security/support documentation.
 
-Known unsupported areas are FSSHTTP-packaged `.one`, multi-cabinet archives,
-`.onetoc2` hierarchy/order interpretation, visual content, attachments,
-layout/format fidelity, links, and exports.
+Known unsupported areas include fragmented FSSHTTPB data-element
+reconstruction and untested OneNote producer variants.