feat(composer): admit GalaxyMxGateway-backed equipment alias tags (+byte-parity)

src/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer/Phase7Composer.cs

@@ -362,11 +362,16 @@ public static class Phase7Composer
         // Equipment tags = the inverse filter: a Tag bound to an Equipment (non-null EquipmentId)
         // whose driver's namespace is Equipment-kind. FullName is the driver-side wire reference
         // pulled from TagConfig — it becomes the variable's NodeId + read/write routing key.
+        // A Galaxy alias is the one exception to the Equipment-kind namespace rule: a GalaxyMxGateway
+        // driver lives in a SystemPlatform-kind namespace, yet an equipment-scoped alias Tag bound to
+        // it must still surface as an equipment tag — so admit those by DriverType. The galaxyTags
+        // producer keeps its `t.EquipmentId is null` guard, so an alias (EquipmentId set) never
+        // double-counts there.
         var equipmentTags = tags
             .Where(t => t.EquipmentId is not null)
             .Where(t => driversById.TryGetValue(t.DriverInstanceId, out var di)
                         && namespacesById.TryGetValue(di.NamespaceId, out var ns)
-                        && ns.Kind == NamespaceKind.Equipment)
+                        && (ns.Kind == NamespaceKind.Equipment || di.DriverType == "GalaxyMxGateway"))
             .OrderBy(t => t.EquipmentId, StringComparer.Ordinal)
             .ThenBy(t => t.FolderPath ?? string.Empty, StringComparer.Ordinal) // coalesce so the sort matches the artifact-decode side exactly
             .ThenBy(t => t.Name, StringComparer.Ordinal)