feat(docs): grant handbook access to authenticated users

README.md

@@ -22,6 +22,14 @@ This repository owns:
 
 Core owns module discovery, configuration package loading, route registry, RBAC evaluation, capability registry, and shared WebUI shell behavior.
 
+While Docs is installed, its managed `docs_reader` tenant role is an automatic
+authenticated-member baseline. Access derives its narrow read grant from the
+active Docs manifest without per-user assignments or authorization-time writes,
+so ordinary users can open their configured handbook without an administrator
+assigning documentation access one account at a time.
+Administrative documentation remains separately protected by
+`docs:documentation:admin` or the applicable administration scope.
+
 ## Documentation model
 
 The docs module should render documentation in three layers: