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.CLI/Helpers/NodeIdParser.cs

@@ -0,0 +1,57 @@
+using Opc.Ua;
+
+namespace ZB.MOM.WW.OtOpcUa.Client.CLI.Helpers;
+
+/// <summary>
+///     Parses node ID strings into OPC UA <see cref="NodeId" /> objects.
+///     Supports standard OPC UA format (e.g., "ns=2;s=MyNode", "i=85") and bare numeric IDs.
+/// </summary>
+public static class NodeIdParser
+{
+    /// <summary>
+    ///     Parses a string into a <see cref="NodeId" />. Returns <c>null</c> if the input is null or empty.
+    /// </summary>
+    /// <param name="nodeIdString">The node ID string to parse.</param>
+    /// <returns>A parsed <see cref="NodeId" />, or <c>null</c> if input is null/empty.</returns>
+    /// <exception cref="FormatException">Thrown when the string cannot be parsed as a valid NodeId.</exception>
+    public static NodeId? Parse(string? nodeIdString)
+    {
+        if (string.IsNullOrWhiteSpace(nodeIdString))
+            return null;
+
+        var trimmed = nodeIdString.Trim();
+
+        // Standard OPC UA format: ns=X;s=..., ns=X;i=..., ns=X;g=..., ns=X;b=...
+        // Also: s=..., i=..., g=..., b=... (namespace 0 implied)
+        if (trimmed.Contains('='))
+            try
+            {
+                return NodeId.Parse(trimmed);
+            }
+            catch (Exception ex)
+            {
+                throw new FormatException($"Invalid node ID format: '{nodeIdString}'", ex);
+            }
+
+        // Bare numeric: treat as namespace 0, numeric identifier
+        if (uint.TryParse(trimmed, out var numericId)) return new NodeId(numericId);
+
+        throw new FormatException(
+            $"Invalid node ID format: '{nodeIdString}'. Expected format like 'ns=2;s=MyNode', 'i=85', or a numeric ID.");
+    }
+
+    /// <summary>
+    ///     Parses a string into a <see cref="NodeId" />, throwing if the input is null or empty.
+    /// </summary>
+    /// <param name="nodeIdString">The node ID string to parse.</param>
+    /// <returns>A parsed <see cref="NodeId" />.</returns>
+    /// <exception cref="ArgumentException">Thrown when the input is null or empty.</exception>
+    /// <exception cref="FormatException">Thrown when the string cannot be parsed as a valid NodeId.</exception>
+    public static NodeId ParseRequired(string? nodeIdString)
+    {
+        var result = Parse(nodeIdString);
+        if (result == null)
+            throw new ArgumentException("Node ID is required but was not provided.");
+        return result;
+    }
+}