docs: defer Herdr and project workflow work

docs/constellation.md

@@ -43,7 +43,8 @@ use a flake to declare its tools without Nix owning the surrounding workspace.
 - Keep Niri workspaces flexible. Herdr supplies enough structure that no strict
   desktop grouping, fixed workspace names or project-to-workspace mapping is
   needed now. Let actual use inform any later organization.
-- Project and agent working practices remain exploratory.
+- Further Herdr configuration, agent workflows and project management are deferred
+  until the user chooses to revisit them. Existing configuration remains in use.
   Alignment, maintainability and human attention matter
   alongside speed/cost. Agent-workflow evaluation is deferred; no fixed delegation
   pattern has been selected.