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>

tests/ZB.MOM.WW.OtOpcUa.Client.Shared.Tests/Fakes/FakeSubscriptionAdapter.cs

@@ -0,0 +1,111 @@
+using Opc.Ua;
+using ZB.MOM.WW.OtOpcUa.Client.Shared.Adapters;
+
+namespace ZB.MOM.WW.OtOpcUa.Client.Shared.Tests.Fakes;
+
+/// <summary>
+/// Test double for <see cref="ISubscriptionAdapter" /> used to drive monitored-item behavior in shared-client tests.
+/// </summary>
+internal sealed class FakeSubscriptionAdapter : ISubscriptionAdapter
+{
+    private readonly
+        Dictionary<uint, (NodeId NodeId, Action<string, DataValue>? DataCallback, Action<EventFieldList>? EventCallback
+            )> _items = new();
+
+    private uint _nextHandle = 100;
+    /// <summary>
+    /// Gets a value indicating whether the fake subscription has been deleted.
+    /// </summary>
+    public bool Deleted { get; private set; }
+
+    /// <summary>
+    /// Gets a value indicating whether a condition refresh was requested by the client under test.
+    /// </summary>
+    public bool ConditionRefreshCalled { get; private set; }
+
+    /// <summary>
+    /// Gets or sets a value indicating whether condition refresh should throw to simulate unsupported servers.
+    /// </summary>
+    public bool ThrowOnConditionRefresh { get; set; }
+    public int AddDataChangeCount { get; private set; }
+    public int AddEventCount { get; private set; }
+    public int RemoveCount { get; private set; }
+
+    /// <summary>
+    ///     Gets the handles of all active items.
+    /// </summary>
+    public IReadOnlyCollection<uint> ActiveHandles => _items.Keys.ToList();
+
+    /// <inheritdoc />
+    public uint SubscriptionId { get; set; } = 42;
+
+    /// <inheritdoc />
+    public Task<uint> AddDataChangeMonitoredItemAsync(NodeId nodeId, int samplingIntervalMs,
+        Action<string, DataValue> onDataChange, CancellationToken ct)
+    {
+        AddDataChangeCount++;
+        var handle = _nextHandle++;
+        _items[handle] = (nodeId, onDataChange, null);
+        return Task.FromResult(handle);
+    }
+
+    /// <inheritdoc />
+    public Task RemoveMonitoredItemAsync(uint clientHandle, CancellationToken ct)
+    {
+        RemoveCount++;
+        _items.Remove(clientHandle);
+        return Task.CompletedTask;
+    }
+
+    /// <inheritdoc />
+    public Task<uint> AddEventMonitoredItemAsync(NodeId nodeId, int samplingIntervalMs, EventFilter filter,
+        Action<EventFieldList> onEvent, CancellationToken ct)
+    {
+        AddEventCount++;
+        var handle = _nextHandle++;
+        _items[handle] = (nodeId, null, onEvent);
+        return Task.FromResult(handle);
+    }
+
+    /// <inheritdoc />
+    public Task ConditionRefreshAsync(CancellationToken ct)
+    {
+        ConditionRefreshCalled = true;
+        if (ThrowOnConditionRefresh)
+            throw new InvalidOperationException("Condition refresh not supported");
+        return Task.CompletedTask;
+    }
+
+    /// <inheritdoc />
+    public Task DeleteAsync(CancellationToken ct)
+    {
+        Deleted = true;
+        _items.Clear();
+        return Task.CompletedTask;
+    }
+
+    /// <summary>
+    /// Clears tracked monitored items when the fake subscription is disposed by the client under test.
+    /// </summary>
+    public void Dispose()
+    {
+        _items.Clear();
+    }
+
+    /// <summary>
+    ///     Simulates a data change notification for testing.
+    /// </summary>
+    public void SimulateDataChange(uint handle, DataValue value)
+    {
+        if (_items.TryGetValue(handle, out var item) && item.DataCallback != null)
+            item.DataCallback(item.NodeId.ToString(), value);
+    }
+
+    /// <summary>
+    ///     Simulates an event notification for testing.
+    /// </summary>
+    public void SimulateEvent(uint handle, EventFieldList eventFields)
+    {
+        if (_items.TryGetValue(handle, out var item) && item.EventCallback != null) item.EventCallback(eventFields);
+    }
+}