feat(export): configurable CSV field quoting mode

crates/dbx-core/tests/live_sqlserver_completion.rs

@@ -1203,6 +1203,7 @@ async fn live_sqlserver_query_result_export_streams_cte_query_to_csv() {
         client_session_id: None,
         execution_id: Some(format!("live-sqlserver-export-{suffix}")),
         date_time_format: None,
+        csv_quote_mode: Default::default(),
         export_table_name: None,
         export_column_types: None,
         column_comments: None,