review(b2-waveA): /raw auto-expand enterprise roots; friendly create-race + delete failures; auth-guard classifies /raw + dev demo

Wave-A reviewer findings (no Critical/High):
- M-2: GlobalRaw auto-expands Enterprise roots so the Cluster level is visible on load (mirrors GlobalUns.ExpandStructural); clusters stay lazily collapsed.
- L-1: create mutations route SaveChanges through SaveCreateAsync — a lost sibling-name race (filtered-unique-index clash) becomes a friendly failure instead of an uncaught DbUpdateException.
- L-2: SaveDeleteAsync no longer leaks raw EF/SQL text; operator-friendly guidance.
- L-5: RawNode.ChildCount doc clarified (direct children only).
- Regression fix: PageAuthorizationGuardTests classifies the two new routable pages (/raw → ConfigEditor, /dev/context-menu-demo → AuthenticatedRead).
M-1 (ordinal vs SQL-collation sibling uniqueness) assessed benign: name indexes use the DB default collation and the server-side pre-check runs under that same collation, so pre-check and index agree — no case-variant rows can coexist, so runtime ordinal RawPath keying never collides.

Claude-Session: https://claude.ai/code/session_01LVneM3eh1UtJxEisFXgmox

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Raw/GlobalRaw.razor

@@ -55,6 +55,12 @@
         try
         {
             _roots = await Svc.LoadRootsAsync();
+            // Auto-expand the Enterprise roots so the Cluster level (which owns the lazy plumbing) is
+            // visible on load, mirroring GlobalUns.ExpandStructural. Enterprise children (clusters) are
+            // eagerly materialised by LoadRootsAsync, so this needs no lazy fetch; clusters stay
+            // collapsed and load their folders/drivers on first expand.
+            foreach (var enterprise in _roots)
+                enterprise.Expanded = true;
         }
         catch (Exception ex)
         {