- Replace opr:"ct" with opr:"sw" in filter examples in list_datasets,
list_charts, and list_dashboards docstrings — "ct" is not a valid
ColumnOperatorEnum value, so examples using it produce validation errors
- Fix TestDashboardSortableColumns.test_sortable_columns_in_docstring:
assertion checked for "Sortable columns for order_column:" (plain text)
but docstring uses RST backtick format; split into two substring checks
matching "Sortable columns for" and "order_column" separately