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.Historian.Aveva/IHistorianConnectionFactory.cs

@@ -0,0 +1,81 @@
+using System;
+using System.Threading;
+using ArchestrA;
+using ZB.MOM.WW.OtOpcUa.Host.Configuration;
+
+namespace ZB.MOM.WW.OtOpcUa.Historian.Aveva
+{
+    /// <summary>
+    ///     Creates and opens Historian SDK connections. Extracted so tests can inject
+    ///     fakes that control connection success, failure, and timeout behavior.
+    /// </summary>
+    internal interface IHistorianConnectionFactory
+    {
+        /// <summary>
+        ///     Creates a new Historian SDK connection, opens it, and waits until it is ready.
+        ///     Throws on connection failure or timeout.
+        /// </summary>
+        HistorianAccess CreateAndConnect(HistorianConfiguration config, HistorianConnectionType type);
+    }
+
+    /// <summary>
+    ///     Production implementation that creates real Historian SDK connections.
+    /// </summary>
+    internal sealed class SdkHistorianConnectionFactory : IHistorianConnectionFactory
+    {
+        public HistorianAccess CreateAndConnect(HistorianConfiguration config, HistorianConnectionType type)
+        {
+            var conn = new HistorianAccess();
+
+            var args = new HistorianConnectionArgs
+            {
+                ServerName = config.ServerName,
+                TcpPort = (ushort)config.Port,
+                IntegratedSecurity = config.IntegratedSecurity,
+                UseArchestrAUser = config.IntegratedSecurity,
+                ConnectionType = type,
+                ReadOnly = true,
+                PacketTimeout = (uint)(config.CommandTimeoutSeconds * 1000)
+            };
+
+            if (!config.IntegratedSecurity)
+            {
+                args.UserName = config.UserName ?? string.Empty;
+                args.Password = config.Password ?? string.Empty;
+            }
+
+            if (!conn.OpenConnection(args, out var error))
+            {
+                conn.Dispose();
+                throw new InvalidOperationException(
+                    $"Failed to open Historian SDK connection to {config.ServerName}:{config.Port}: {error.ErrorCode}");
+            }
+
+            // The SDK connects asynchronously — poll until the connection is ready
+            var timeoutMs = config.CommandTimeoutSeconds * 1000;
+            var elapsed = 0;
+            while (elapsed < timeoutMs)
+            {
+                var status = new HistorianConnectionStatus();
+                conn.GetConnectionStatus(ref status);
+
+                if (status.ConnectedToServer)
+                    return conn;
+
+                if (status.ErrorOccurred)
+                {
+                    conn.Dispose();
+                    throw new InvalidOperationException(
+                        $"Historian SDK connection failed: {status.Error}");
+                }
+
+                Thread.Sleep(250);
+                elapsed += 250;
+            }
+
+            conn.Dispose();
+            throw new TimeoutException(
+                $"Historian SDK connection to {config.ServerName}:{config.Port} timed out after {config.CommandTimeoutSeconds}s");
+        }
+    }
+}