docs(openapi): clarify admin spec scope includes pad-side endpoints

/api/version-status is a public pad-side endpoint but lives in the
admin OpenAPI document because it shares the same internal route
registration. Add a note to info.description so downstream tooling
consumers are not misled into treating it as an admin-only route.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: JohnMcLear

src/node/hooks/express/openapi-admin.ts

@@ -20,7 +20,10 @@ export const generateAdminDefinition = (): any => ({
     title: 'Etherpad Admin API',
     description:
       'Authenticated administrative endpoints consumed by the Etherpad admin UI. ' +
-      'Distinct from the public /api/{version}/* surface served by /api/openapi.json.',
+      'Distinct from the public /api/{version}/* surface served by /api/openapi.json. ' +
+      'For completeness this document also includes non-admin endpoints that are ' +
+      'consumed by the pad UI itself (e.g. /api/version-status) since they share the ' +
+      'same internal route registration.',
     version: getEpVersion(),
   },
   paths: {