Generate {{W_PFDSGN}} FITS card at LAM

In order for the DRP to know which fibers are illuminated at LAM, it needs the id of a PfsDesign. At Subaru, this will come from the fpsActor; I think the sensible equivalent for LAM is the dcbActor, since that is the closest code to the fiber bundles and their illumination.

We (DRP) will make {{PfsDesign}}s for the named fiber groups which we know about ("orange", "red1", etc.), and price will either provide a function for making a hex ID from a list of names, or a dictionary of IDs.

Can the dcbActor arrange to generate a keyword for that ID ("designId", maybe?), with the FITS card being (W_PFDSGN, PFS_DESIGN_ID)? I think we want a Long keyword because the values will be 16 hex digits long.