Iterates over registered recipes and creates missing badges.

def sync_badges(**kwargs):
    """
    Iterates over registered recipes and creates missing badges.
    """
    update = kwargs.get('update', False)
    created_badges = []
    instances = registry.get_recipe_instances()

    for instance in instances:
        reset_queries()
        badge, created = instance.create_badge(update=update)
        if created:
            created_badges.append(badge)
        log_queries(instance)

    return created_badges