test(jassub): [PKG-JASSUB-01] freeze published contracts and vendor evidence

packages/artplayer-plugin-jassub/README.md

@@ -6,6 +6,11 @@ jassub plugin for ArtPlayer
 
 [https://artplayer.org](https://artplayer.org/?libs=./uncompiled/artplayer-plugin-jassub/index.js&example=jassub)
 
+## Maintenance
+
+See [maintenance notes](ARCHITECTURE.md) for adapter/vendor boundaries, resource paths,
+historical declaration differences and the current validation scope.
+
 ## License
 
 MIT © Harvey Zhao