Enhancement: support assigning custom fields via consumption templates (#4727)

src-ui/src/app/data/paperless-consumption-template.ts

@@ -38,4 +38,6 @@ export interface PaperlessConsumptionTemplate extends ObjectWithId {
   assign_change_users?: number[] // [PaperlessUser.id]
 
   assign_change_groups?: number[] // [PaperlessGroup.id]
+
+  assign_custom_fields?: number[] // [PaperlessCustomField.id]
 }