Phase 0 — mechanical rename ZB.MOM.WW.LmxOpcUa.* → ZB.MOM.WW.OtOpcUa.*

Renames all 11 projects (5 src + 6 tests), the .slnx solution file, all source-file namespaces, all axaml namespace references, and all v1 documentation references in CLAUDE.md and docs/*.md (excluding docs/v2/ which is already in OtOpcUa form). Also updates the TopShelf service registration name from "LmxOpcUa" to "OtOpcUa" per Phase 0 Task 0.6.

Preserves runtime identifiers per Phase 0 Out-of-Scope rules to avoid breaking v1/v2 client trust during coexistence: OPC UA `ApplicationUri` defaults (`urn:{GalaxyName}:LmxOpcUa`), server `EndpointPath` (`/LmxOpcUa`), `ServerName` default (feeds cert subject CN), `MxAccessConfiguration.ClientName` default (defensive — stays "LmxOpcUa" for MxAccess audit-trail consistency), client OPC UA identifiers (`ApplicationName = "LmxOpcUaClient"`, `ApplicationUri = "urn:localhost:LmxOpcUaClient"`, cert directory `%LocalAppData%\LmxOpcUaClient\pki\`), and the `LmxOpcUaServer` class name (class rename out of Phase 0 scope per Task 0.5 sed pattern; happens in Phase 1 alongside `LmxNodeManager → GenericDriverNodeManager` Core extraction). 23 LmxOpcUa references retained, all enumerated and justified in `docs/v2/implementation/exit-gate-phase-0.md`.

Build clean: 0 errors, 30 warnings (lower than baseline 167). Tests at strict improvement over baseline: 821 passing / 1 failing vs baseline 820 / 2 (one flaky pre-existing failure passed this run; the other still fails — both pre-existing and unrelated to the rename). `Client.UI.Tests`, `Historian.Aveva.Tests`, `Client.Shared.Tests`, `IntegrationTests` all match baseline exactly. Exit gate compliance results recorded in `docs/v2/implementation/exit-gate-phase-0.md` with all 7 checks PASS or DEFERRED-to-PR-review (#7 service install verification needs Windows service permissions on the reviewer's box).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/ZB.MOM.WW.OtOpcUa.Client.Shared/Adapters/DefaultSubscriptionAdapter.cs

@@ -0,0 +1,133 @@
+using Opc.Ua;
+using Opc.Ua.Client;
+using Serilog;
+
+namespace ZB.MOM.WW.OtOpcUa.Client.Shared.Adapters;
+
+/// <summary>
+///     Production subscription adapter wrapping a real OPC UA Subscription.
+/// </summary>
+internal sealed class DefaultSubscriptionAdapter : ISubscriptionAdapter
+{
+    private static readonly ILogger Logger = Log.ForContext<DefaultSubscriptionAdapter>();
+    private readonly Dictionary<uint, MonitoredItem> _monitoredItems = new();
+    private readonly Subscription _subscription;
+
+    /// <summary>
+    /// Wraps a live OPC UA subscription so client code can manage monitored items through a testable abstraction.
+    /// </summary>
+    /// <param name="subscription">The underlying OPC UA subscription that owns monitored items for this client workflow.</param>
+    public DefaultSubscriptionAdapter(Subscription subscription)
+    {
+        _subscription = subscription;
+    }
+
+    /// <inheritdoc />
+    public uint SubscriptionId => _subscription.Id;
+
+    /// <inheritdoc />
+    public async Task<uint> AddDataChangeMonitoredItemAsync(
+        NodeId nodeId, int samplingIntervalMs, Action<string, DataValue> onDataChange, CancellationToken ct)
+    {
+        var item = new MonitoredItem(_subscription.DefaultItem)
+        {
+            StartNodeId = nodeId,
+            DisplayName = nodeId.ToString(),
+            SamplingInterval = samplingIntervalMs
+        };
+
+        item.Notification += (_, e) =>
+        {
+            if (e.NotificationValue is MonitoredItemNotification notification)
+                onDataChange(nodeId.ToString(), notification.Value);
+        };
+
+        _subscription.AddItem(item);
+        await _subscription.ApplyChangesAsync(ct);
+
+        var handle = item.ClientHandle;
+        _monitoredItems[handle] = item;
+
+        Logger.Debug("Added data change monitored item for {NodeId}, handle={Handle}", nodeId, handle);
+        return handle;
+    }
+
+    /// <inheritdoc />
+    public async Task RemoveMonitoredItemAsync(uint clientHandle, CancellationToken ct)
+    {
+        if (!_monitoredItems.TryGetValue(clientHandle, out var item))
+            return;
+
+        _subscription.RemoveItem(item);
+        await _subscription.ApplyChangesAsync(ct);
+        _monitoredItems.Remove(clientHandle);
+
+        Logger.Debug("Removed monitored item handle={Handle}", clientHandle);
+    }
+
+    /// <inheritdoc />
+    public async Task<uint> AddEventMonitoredItemAsync(
+        NodeId nodeId, int samplingIntervalMs, EventFilter filter, Action<EventFieldList> onEvent, CancellationToken ct)
+    {
+        var item = new MonitoredItem(_subscription.DefaultItem)
+        {
+            StartNodeId = nodeId,
+            DisplayName = "AlarmMonitor",
+            SamplingInterval = samplingIntervalMs,
+            NodeClass = NodeClass.Object,
+            AttributeId = Attributes.EventNotifier,
+            Filter = filter
+        };
+
+        item.Notification += (_, e) =>
+        {
+            if (e.NotificationValue is EventFieldList eventFields) onEvent(eventFields);
+        };
+
+        _subscription.AddItem(item);
+        await _subscription.ApplyChangesAsync(ct);
+
+        var handle = item.ClientHandle;
+        _monitoredItems[handle] = item;
+
+        Logger.Debug("Added event monitored item for {NodeId}, handle={Handle}", nodeId, handle);
+        return handle;
+    }
+
+    /// <inheritdoc />
+    public async Task ConditionRefreshAsync(CancellationToken ct)
+    {
+        await _subscription.ConditionRefreshAsync(ct);
+    }
+
+    /// <inheritdoc />
+    public async Task DeleteAsync(CancellationToken ct)
+    {
+        try
+        {
+            await _subscription.DeleteAsync(true);
+        }
+        catch (Exception ex)
+        {
+            Logger.Warning(ex, "Error deleting subscription");
+        }
+
+        _monitoredItems.Clear();
+    }
+
+    /// <summary>
+    /// Releases the wrapped OPC UA subscription and clears tracked monitored items held by the adapter.
+    /// </summary>
+    public void Dispose()
+    {
+        try
+        {
+            _subscription.Delete(true);
+        }
+        catch
+        {
+        }
+
+        _monitoredItems.Clear();
+    }
+}