3fa541a032
Backend: PythonTransformNode wraps script execution in a try/catch that runs the exception through IronPython's ExceptionOperations.FormatException. Users now see a proper Python-style traceback (file, line, type, message) instead of the bare CLR message (which was often empty or just "unexpected token"). Source is named "script" for readable File lines in the trace. Frontend: findLatestIo also returns status + error; NodeEditorDialog renders a red-bordered traceback block in the Output column when the node failed, replacing the misleading "No data yet" state.