Refactor display exclusion for clarity purposes

models/intermediate/cross/schema.yml

@@ -2538,13 +2538,19 @@ models:
         data_tests:
           - not_null
 
-      - name: requires_invoicing_data
-        data_type: boolean
+      - name: display_exclusion
+        data_type: string
         description: |
-          Flag to indicate if the metric requires invoicing data to be calculated.
+          Category to indicate if the metric requires a certain exclusion due 
+          to relying on not timely information.
           This will limit the display for reporting purposes.
         data_tests:
           - not_null
+          - accepted_values:
+              values:
+                - NONE
+                - INVOICING
+                - ONGOING_MONTH
 
       - name: current_month_mtd
         data_type: numeric