docs(lynx): note paired entry validation

Author: ScriptedAlchemy

.changeset/tiny-lynxes-federate.md

@@ -17,7 +17,8 @@ loading, and omit assetless remote-only chunk groups.
 Bootstrap the ReactLynx lazy-bundle loader before federation async startup so
 initial shared chunks use FetchBundle instead of the legacy component loader.
 Embed the paired container entry in native split remotes so fetched main-thread
-chunks install their snapshot factories before React commits them.
+chunks install their snapshot factories before React commits them, and reject
+remote entries that omit the paired section.
 Accept the cache-events plugin 0.2 line used by Rspeedy 0.16.
 
 Resolve manifest `publicPath: 'auto'` from the fetched response URL so