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/primitive_instance.sql

@@ -0,0 +1,34 @@
+-- Table: primitive_instance
+CREATE TABLE [primitive_instance] (
+    [gobject_id] int NOT NULL,
+    [package_id] int NOT NULL,
+    [mx_primitive_id] smallint NOT NULL,
+    [primitive_definition_id] int NOT NULL,
+    [primitive_name] nvarchar(329) NOT NULL,
+    [parent_mx_primitive_id] smallint NOT NULL,
+    [execution_group] int NOT NULL,
+    [execution_order] int NOT NULL DEFAULT ((-1)),
+    [owned_by_gobject_id] int NOT NULL DEFAULT ((0)),
+    [timestamp_of_last_change] bigint NULL DEFAULT ((0)),
+    [max_child_timestamp] bigint NULL DEFAULT ((0)),
+    [extension_type] nvarchar(329) NULL,
+    [is_object_extension] bit NULL DEFAULT ((0)),
+    [checked_in_primitive_version] int NOT NULL DEFAULT ((1)),
+    [checked_out_primitive_version] int NOT NULL DEFAULT ((1)),
+    [entity_change_type] int NOT NULL DEFAULT ((1)),
+    [operation_on_primitive_mask] int NOT NULL DEFAULT ((0)),
+    [created_by_parent] smallint NOT NULL DEFAULT ((0)),
+    [status_id] smallint NOT NULL DEFAULT ((0)),
+    [ref_status_id] smallint NOT NULL DEFAULT ((0)),
+    [primitive_attributes] image(2147483647) NULL,
+    [mx_value_errors] text(2147483647) NOT NULL,
+    [mx_value_warnings] text(2147483647) NOT NULL,
+    [mx_value_reference_warnings] text(2147483647) NOT NULL,
+    [property_bitmask] smallint NOT NULL DEFAULT ((0)),
+    CONSTRAINT [PK_primitive_instance] PRIMARY KEY ([gobject_id], [package_id], [mx_primitive_id], [gobject_id], [package_id], [gobject_id], [package_id])
+);
+GO
+
+ALTER TABLE [primitive_instance] ADD FOREIGN KEY ([package_id]) REFERENCES [package] ([package_id]);
+GO
+