Unit awareness of attune delay
https://gitlab.com/yaq/yaqd-attune/-/blob/main/yaqd_attune/_attune_delay.py#L55
Currently the units of "ps" are hard coded to the attune delay class, however technically curves could be made with other units (though ps is the most common...) So we should likely ensure that we are getting the right value in the right units (and most notably the same units for all enabled tunes) by passing the units explicitly to __call__
Especially if we intend to make units setable, which could happen by extracting all the business logic to a more general class as it is the same that would be needed for e.g. cosetting filter wheels, aside from units. (though having separate classes for separate concerns would allow for specialization where needed)