Implement LmxOpcUa server — all 6 phases complete

Full OPC UA server on .NET Framework 4.8 (x86) exposing AVEVA System
Platform Galaxy tags via MXAccess. Mirrors Galaxy object hierarchy as
OPC UA address space, translating contained-name browse paths to
tag-name runtime references.

Components implemented:
- Configuration: AppConfiguration with 4 sections, validator
- Domain: ConnectionState, Quality, Vtq, MxDataTypeMapper, error codes
- MxAccess: StaComThread, MxAccessClient (partial classes), MxProxyAdapter
  using strongly-typed ArchestrA.MxAccess COM interop
- Galaxy Repository: SQL queries (hierarchy, attributes, change detection),
  ChangeDetectionService with auto-rebuild on deploy
- OPC UA Server: LmxNodeManager (CustomNodeManager2), LmxOpcUaServer,
  OpcUaServerHost with programmatic config, SecurityPolicy None
- Status Dashboard: HTTP server with HTML/JSON/health endpoints
- Integration: Full 14-step startup, graceful shutdown, component wiring

175 tests (174 unit + 1 integration), all passing.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/ZB.MOM.WW.LmxOpcUa.Host/Domain/GalaxyAttributeInfo.cs

@@ -0,0 +1,17 @@
+namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
+{
+    /// <summary>
+    /// DTO matching attributes.sql result columns. (GR-002)
+    /// </summary>
+    public class GalaxyAttributeInfo
+    {
+        public int GobjectId { get; set; }
+        public string TagName { get; set; } = "";
+        public string AttributeName { get; set; } = "";
+        public string FullTagReference { get; set; } = "";
+        public int MxDataType { get; set; }
+        public string DataTypeName { get; set; } = "";
+        public bool IsArray { get; set; }
+        public int? ArrayDimension { get; set; }
+    }
+}