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/Domain/QualityMapper.cs

@@ -0,0 +1,60 @@
+using System;
+
+namespace ZB.MOM.WW.OtOpcUa.Host.Domain
+{
+    /// <summary>
+    ///     Maps MXAccess integer quality to domain Quality enum and OPC UA StatusCodes. (MXA-009, OPC-005)
+    /// </summary>
+    public static class QualityMapper
+    {
+        /// <summary>
+        ///     Maps an MXAccess quality integer (OPC DA quality byte) to domain Quality.
+        ///     Uses category bits: 192+ = Good, 64-191 = Uncertain, 0-63 = Bad.
+        /// </summary>
+        /// <param name="mxQuality">The raw MXAccess quality integer.</param>
+        /// <returns>The mapped bridge quality value.</returns>
+        public static Quality MapFromMxAccessQuality(int mxQuality)
+        {
+            var b = (byte)(mxQuality & 0xFF);
+
+            // Try exact match first
+            if (Enum.IsDefined(typeof(Quality), b))
+                return (Quality)b;
+
+            // Fall back to category
+            if (b >= 192) return Quality.Good;
+            if (b >= 64) return Quality.Uncertain;
+            return Quality.Bad;
+        }
+
+        /// <summary>
+        ///     Maps domain Quality to OPC UA StatusCode uint32.
+        /// </summary>
+        /// <param name="quality">The bridge quality value.</param>
+        /// <returns>The OPC UA status code represented as a 32-bit unsigned integer.</returns>
+        public static uint MapToOpcUaStatusCode(Quality quality)
+        {
+            return quality switch
+            {
+                Quality.Good => 0x00000000u, // Good
+                Quality.GoodLocalOverride => 0x00D80000u, // Good_LocalOverride
+                Quality.Uncertain => 0x40000000u, // Uncertain
+                Quality.UncertainLastUsable => 0x40900000u,
+                Quality.UncertainSensorNotAccurate => 0x40930000u,
+                Quality.UncertainEuExceeded => 0x40940000u,
+                Quality.UncertainSubNormal => 0x40950000u,
+                Quality.Bad => 0x80000000u, // Bad
+                Quality.BadConfigError => 0x80890000u,
+                Quality.BadNotConnected => 0x808A0000u,
+                Quality.BadDeviceFailure => 0x808B0000u,
+                Quality.BadSensorFailure => 0x808C0000u,
+                Quality.BadCommFailure => 0x80050000u,
+                Quality.BadOutOfService => 0x808D0000u,
+                Quality.BadWaitingForInitialData => 0x80320000u,
+                _ => quality.IsGood() ? 0x00000000u :
+                    quality.IsUncertain() ? 0x40000000u :
+                    0x80000000u
+            };
+        }
+    }
+}