Update README limitations for hirelings, events and inventory

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -66,8 +66,9 @@ The same numbering rules as the caches apply. <br>
 
 ### Limitations
 
-Hirelings, ZoneEvents and Mobile Inventory are not parsed or written as there were no <br>
-examples in the .cache files to begin with.  The game does seem to support them, however.
+Hirelings, zone events and mobile inventory are parsed and written following the client's <br>
+loaders, but the shipped CZone.cache has no examples of them. `python tests/czone_synthetic.py` <br>
+(run from mbEditorPro2.0) checks these structures with hand-built records.
 
 ### JSON