Fix missing permission for dev broadcast users

This is normally added automatically [^1].

[^1]: b145a29935/app/dao/broadcast_service_dao.py (L69)

app/commands.py

@@ -833,6 +833,7 @@ def local_dev_broadcast_permissions(user_id):
                 'reject_broadcasts', 'cancel_broadcasts',  # required to create / approve
                 'create_broadcasts', 'approve_broadcasts',  # minimum for testing
                 'manage_templates',  # unlikely but might be useful
+                'view_activity',  # normally added on invite / service creation
             ]
         ]