v3(b1-wp4b): make AdminUI compile against greenfield schema behind Batch-2/3 stubs

Namespace entity + NamespaceKind retired; DriverInstance dropped NamespaceId;
Tag is raw-only (no EquipmentId/DriverInstanceId/FullName/FolderPath); driver
options replaced pre-declared Tags with RawTags. Stub the retired surfaces so
the AdminUI + Host build green; real Raw/UNS authoring arrives in v3 Batch 2/3.

- ClusterNamespaces/NamespaceEdit: bodies replaced with 'Namespaces retired' banner
- DriverIdentitySection: dropped Namespace dropdown + NamespaceId model field
- 8 driver pages: dropped Namespace binding; retired the pre-declared Tags editor
  (replaced with a '/raw Batch 2' note); multi-device pages keep their Devices editor
- UnsTreeService: equipment-tag counts/list -> empty; Create/UpdateTag -> failure
  result ('Tag authoring moved to the Raw tree (/raw) in v3 Batch 2'); Namespace/
  driver-binding queries removed
- IScriptTagCatalog: project surviving Tag columns only (path from TagConfig FullName, else Name)
- OpcUaClientTagConfigEditor: rebind stale FullName -> model's NodeId
- ClusterDrivers: drop retired NamespaceId column

AdminUI + Host build 0/0. AdminUI.Tests / Host.IntegrationTests remain red (WP6).

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Shared/Drivers/DriverIdentitySection.razor

@@ -40,16 +40,6 @@
                     <div class="form-text">Cannot be changed after creation — drives the actor type that owns this instance.</div>
                 </div>
             }
-            <div class="col-md-6 mb-3">
-                <label class="form-label" for="ns">Namespace</label>
-                <InputSelect id="ns" @bind-Value="Model.NamespaceId" class="form-select form-select-sm">
-                    @foreach (var ns in Namespaces)
-                    {
-                        <option value="@ns.NamespaceId">@ns.NamespaceId (@ns.Kind)</option>
-                    }
-                </InputSelect>
-                <ValidationMessage For="@(() => Model.NamespaceId)" />
-            </div>
         </div>
         <div class="mb-3">
             <label class="form-label" for="enabled">Enabled</label>
@@ -63,7 +53,6 @@
 
 @code {
     [Parameter, EditorRequired] public DriverIdentityModel Model { get; set; } = new();
-    [Parameter, EditorRequired] public IReadOnlyList<Namespace> Namespaces { get; set; } = [];
     [Parameter] public bool IsNew { get; set; }
     [Parameter] public bool ShowDriverType { get; set; }
 
@@ -73,7 +62,6 @@
         public string DriverInstanceId { get; set; } = "";
         [Required] public string Name { get; set; } = "";
         [Required] public string DriverType { get; set; } = "Modbus";
-        [Required] public string NamespaceId { get; set; } = "";
         public bool Enabled { get; set; } = true;
     }
 }