add escape_column_names to stage multikey for prejoined columns

Author: tkiehn

macros/staging/fabric/stage.sql

@@ -311,7 +311,7 @@ prejoined_columns AS (
     {%- set prejoin_alias = 'pj_' + loop.index|string -%}
 
     left join {{ relation }} as {{ prejoin_alias }} 
-      on {{ datavault4dbt.multikey(columns=vals['this_column_name'], prefix=['lcte', prejoin_alias], condition='=', operator=operator, right_columns=vals['ref_column_name']) }}
+      on {{ datavault4dbt.multikey(columns=datavault4dbt.escape_column_names(vals['this_column_name']), prefix=['lcte', prejoin_alias], condition='=', operator=operator, right_columns=datavault4dbt.escape_column_names(vals['ref_column_name'])) }}
 
   {% endfor %}