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.Host/OpcUa/ServiceLevelCalculator.cs

@@ -0,0 +1,33 @@
+using System;
+
+namespace ZB.MOM.WW.OtOpcUa.Host.OpcUa
+{
+    /// <summary>
+    ///     Computes the OPC UA ServiceLevel byte from a baseline and runtime health inputs.
+    /// </summary>
+    public sealed class ServiceLevelCalculator
+    {
+        /// <summary>
+        ///     Calculates the current ServiceLevel from a role-adjusted baseline and health state.
+        /// </summary>
+        /// <param name="baseLevel">The role-adjusted baseline (e.g., 200 for primary, 150 for secondary).</param>
+        /// <param name="mxAccessConnected">Whether the MXAccess runtime connection is healthy.</param>
+        /// <param name="dbConnected">Whether the Galaxy repository database is reachable.</param>
+        /// <returns>A ServiceLevel byte between 0 and 255.</returns>
+        public byte Calculate(int baseLevel, bool mxAccessConnected, bool dbConnected)
+        {
+            if (!mxAccessConnected && !dbConnected)
+                return 0;
+
+            var level = baseLevel;
+
+            if (!mxAccessConnected)
+                level -= 100;
+
+            if (!dbConnected)
+                level -= 50;
+
+            return (byte)Math.Max(0, Math.Min(level, 255));
+        }
+    }
+}