add another stat to the migration script

Author: felliott

osf/management/commands/migrate_funder_ids_to_ror.py

@@ -98,6 +98,7 @@ def handle(self, *args, **options):
         self.stdout.write(f"  Records re-indexed: {stats['reindexed']}")
         self.stdout.write(f"  Funders migrated: {stats['funders_migrated']}")
         self.stdout.write(f"  Unmapped funders removed: {stats['not_in_mapping']}")
+        self.stdout.write(f"  Unique funders not in mapping: {len(stats['unmapped_ids'])}")
         if stats['errors']:
             self.stdout.write(self.style.ERROR(f"  Errors: {stats['errors']}"))