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>

gr/ddl/tables/gobject.sql

@@ -0,0 +1,35 @@
+-- Table: gobject
+CREATE TABLE [gobject] (
+    [gobject_id] int NOT NULL,
+    [template_definition_id] int NOT NULL,
+    [derived_from_gobject_id] int NOT NULL DEFAULT ((0)),
+    [contained_by_gobject_id] int NOT NULL DEFAULT ((0)),
+    [area_gobject_id] int NOT NULL DEFAULT ((0)),
+    [hosted_by_gobject_id] int NOT NULL DEFAULT ((0)),
+    [checked_out_by_user_guid] uniqueidentifier NULL,
+    [default_symbol_gobject_id] int NOT NULL DEFAULT ((0)),
+    [default_display_gobject_id] int NOT NULL DEFAULT ((0)),
+    [checked_in_package_id] int NOT NULL DEFAULT ((0)),
+    [checked_out_package_id] int NOT NULL DEFAULT ((0)),
+    [deployed_package_id] int NOT NULL DEFAULT ((0)),
+    [last_deployed_package_id] int NOT NULL DEFAULT ((0)),
+    [tag_name] nvarchar(329) NOT NULL,
+    [contained_name] nvarchar(32) NOT NULL DEFAULT (''),
+    [identity_guid] uniqueidentifier NOT NULL DEFAULT (newid()),
+    [configuration_guid] uniqueidentifier NOT NULL,
+    [configuration_version] int NOT NULL,
+    [deployed_version] int NOT NULL DEFAULT ((0)),
+    [is_template] bit NOT NULL DEFAULT ((0)),
+    [is_hidden] bit NOT NULL DEFAULT ((0)),
+    [software_upgrade_needed] bit NOT NULL DEFAULT ((0)),
+    [hosting_tree_level] smallint NOT NULL DEFAULT ((0)),
+    [hierarchical_name] nvarchar(329) NOT NULL DEFAULT (''),
+    [namespace_id] smallint NOT NULL DEFAULT ((1)),
+    [deployment_pending_status] bit NOT NULL DEFAULT ((0)),
+    CONSTRAINT [PK_gobject] PRIMARY KEY ([gobject_id], [namespace_id], [template_definition_id])
+);
+GO
+
+ALTER TABLE [gobject] ADD FOREIGN KEY ([template_definition_id]) REFERENCES [template_definition] ([template_definition_id]);
+GO
+