fix(deploy): rebuild address space on changed-only deploys (H1a, stillpending §1)

src/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer/Phase7Applier.cs

@@ -77,15 +77,19 @@ public sealed class Phase7Applier
             plan.AddedEquipmentTags.Count +
             plan.AddedEquipmentVirtualTags.Count;
 
-        // Any add/remove of Equipment, ScriptedAlarm, Equipment tag, or Equipment VirtualTag topology
-        // requires a real address-space rebuild. Driver-instance changes don't touch the address-space
-        // topology directly — they go through DriverHostActor's spawn-plan in Runtime.
-        // TODO(equipment-virtualtags): when MaterialiseEquipmentVirtualTags drives per-delta sink work, revisit whether ChangedEquipmentVirtualTags should also force needsRebuild.
+        // Any add / remove / in-place CHANGE of Equipment, ScriptedAlarm, Equipment tag, or Equipment
+        // VirtualTag topology requires a real address-space rebuild — the materialise passes re-derive
+        // every node from the composition, so a changed-only deploy (e.g. a renamed equipment, a
+        // re-severitied alarm, a flipped tag dataType/Writable, or an edited VirtualTag expression) must
+        // still rebuild or the running server keeps the stale node.
+        // ChangedDrivers is deliberately EXCLUDED: a driver-instance config change doesn't touch the
+        // address-space topology — it routes through DriverHostActor's spawn-plan in Runtime, which
+        // re-spawns the affected driver actor without re-materialising any nodes.
         var needsRebuild =
-            plan.AddedEquipment.Count > 0 || plan.RemovedEquipment.Count > 0 ||
-            plan.AddedAlarms.Count > 0 || plan.RemovedAlarms.Count > 0 ||
-            plan.AddedEquipmentTags.Count > 0 || plan.RemovedEquipmentTags.Count > 0 ||
-            plan.AddedEquipmentVirtualTags.Count > 0 || plan.RemovedEquipmentVirtualTags.Count > 0;
+            plan.AddedEquipment.Count > 0 || plan.RemovedEquipment.Count > 0 || plan.ChangedEquipment.Count > 0 ||
+            plan.AddedAlarms.Count > 0 || plan.RemovedAlarms.Count > 0 || plan.ChangedAlarms.Count > 0 ||
+            plan.AddedEquipmentTags.Count > 0 || plan.RemovedEquipmentTags.Count > 0 || plan.ChangedEquipmentTags.Count > 0 ||
+            plan.AddedEquipmentVirtualTags.Count > 0 || plan.RemovedEquipmentVirtualTags.Count > 0 || plan.ChangedEquipmentVirtualTags.Count > 0;
 
         if (needsRebuild)
         {