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/CommandBase.cs

@@ -0,0 +1,124 @@
+using CliFx;
+using CliFx.Attributes;
+using CliFx.Infrastructure;
+using Serilog;
+using ZB.MOM.WW.OtOpcUa.Client.Shared;
+using ZB.MOM.WW.OtOpcUa.Client.Shared.Helpers;
+using ZB.MOM.WW.OtOpcUa.Client.Shared.Models;
+
+namespace ZB.MOM.WW.OtOpcUa.Client.CLI;
+
+/// <summary>
+///     Abstract base class for all CLI commands providing common connection options and helpers.
+/// </summary>
+public abstract class CommandBase : ICommand
+{
+    internal static readonly IOpcUaClientServiceFactory DefaultFactory = new OpcUaClientServiceFactory();
+
+    private readonly IOpcUaClientServiceFactory _factory;
+
+    /// <summary>
+    /// Initializes a CLI command with the shared OPC UA client factory used to create per-command sessions.
+    /// </summary>
+    /// <param name="factory">The factory that creates the shared client service for the command execution.</param>
+    protected CommandBase(IOpcUaClientServiceFactory factory)
+    {
+        _factory = factory;
+    }
+
+    /// <summary>
+    /// Gets the primary OPC UA endpoint URL the command should connect to.
+    /// </summary>
+    [CommandOption("url", 'u', Description = "OPC UA server endpoint URL", IsRequired = true)]
+    public string Url { get; init; } = default!;
+
+    /// <summary>
+    /// Gets the optional username used for authenticated OPC UA sessions.
+    /// </summary>
+    [CommandOption("username", 'U', Description = "Username for authentication")]
+    public string? Username { get; init; }
+
+    /// <summary>
+    /// Gets the optional password paired with <see cref="Username" /> for authenticated OPC UA sessions.
+    /// </summary>
+    [CommandOption("password", 'P', Description = "Password for authentication")]
+    public string? Password { get; init; }
+
+    /// <summary>
+    /// Gets the transport security mode requested by the operator for this CLI session.
+    /// </summary>
+    [CommandOption("security", 'S',
+        Description = "Transport security: none, sign, encrypt, signandencrypt (default: none)")]
+    public string Security { get; init; } = "none";
+
+    /// <summary>
+    /// Gets the optional comma-separated failover endpoints that should be tried if the primary endpoint is unavailable.
+    /// </summary>
+    [CommandOption("failover-urls", 'F', Description = "Comma-separated failover endpoint URLs for redundancy")]
+    public string? FailoverUrls { get; init; }
+
+    /// <summary>
+    /// Gets a value indicating whether verbose Serilog output should be enabled for troubleshooting.
+    /// </summary>
+    [CommandOption("verbose", Description = "Enable verbose/debug logging")]
+    public bool Verbose { get; init; }
+
+    /// <summary>
+    /// Executes the command-specific workflow against the configured OPC UA endpoint.
+    /// </summary>
+    /// <param name="console">The CLI console used for output and cancellation handling.</param>
+    public abstract ValueTask ExecuteAsync(IConsole console);
+
+    /// <summary>
+    ///     Creates a <see cref="ConnectionSettings" /> from the common command options.
+    /// </summary>
+    protected ConnectionSettings CreateConnectionSettings()
+    {
+        var securityMode = SecurityModeMapper.FromString(Security);
+        var failoverUrls = !string.IsNullOrWhiteSpace(FailoverUrls)
+            ? FailoverUrlParser.Parse(Url, FailoverUrls)
+            : null;
+
+        var settings = new ConnectionSettings
+        {
+            EndpointUrl = Url,
+            FailoverUrls = failoverUrls,
+            Username = Username,
+            Password = Password,
+            SecurityMode = securityMode,
+            AutoAcceptCertificates = true
+        };
+
+        return settings;
+    }
+
+    /// <summary>
+    ///     Creates a new <see cref="IOpcUaClientService" />, connects it using the common options,
+    ///     and returns both the service and the connection info.
+    /// </summary>
+    /// <param name="ct">The cancellation token that aborts connection setup for the command.</param>
+    protected async Task<(IOpcUaClientService Service, ConnectionInfo Info)> CreateServiceAndConnectAsync(
+        CancellationToken ct)
+    {
+        var service = _factory.Create();
+        var settings = CreateConnectionSettings();
+        var info = await service.ConnectAsync(settings, ct);
+        return (service, info);
+    }
+
+    /// <summary>
+    ///     Configures Serilog based on the verbose flag.
+    /// </summary>
+    protected void ConfigureLogging()
+    {
+        var config = new LoggerConfiguration();
+        if (Verbose)
+            config.MinimumLevel.Debug()
+                .WriteTo.Console();
+        else
+            config.MinimumLevel.Warning()
+                .WriteTo.Console();
+
+        Log.Logger = config.CreateLogger();
+    }
+}