Fix non-Value attribute writes

[kevinherron]

Summary

Fix server-side Write handling for non-Value attributes so requests write the raw attribute value instead of the surrounding DataValue wrapper. Invalid or incompatible payloads now return operation StatusCode results instead of bubbling unchecked setter exceptions.

• Unwrap non-Value Write payloads before dispatching to node attribute setters, while preserving existing Value attribute behavior.
• Convert wire-decoded enum, option-set, and structured forms into the concrete Java types expected by the built-in setters.
• Add integration coverage for writable non-Value attributes and type mismatch handling.

Key Changes

• Attribute conversion: Non-Value writes now go through a conversion helper keyed by AttributeId, including special handling for NodeClass, option sets, DataTypeDefinition, and role permission arrays.
• Error mapping: Invalid converted values return Bad_TypeMismatch, and UaRuntimeException status codes are preserved instead of escaping the Write service path.
• Regression coverage: AttributeWriterTest now exercises remote Write requests for DisplayName, ArrayDimensions, AccessLevelEx, and mismatched non-Value payloads.

References

• OPC UA Part 4, 5.11.4.2 Write Parameters
• OPC UA Part 4, 5.11.4.4 Write StatusCodes