Save telescope status stream and associate with SuNSS exposures.

For SuNSS observations, we follow a 1Hz stream of status keywords from Gen2, currently:

• timestamp
• requested pointing (ra/dec deg)
• actual telescope pointing (ra/dec deg)
• telescope drive status: Pointing (fixed alt/az), Tracking, Guiding.
• telescope altitude (deg)
• dome position (open/closed)
• offsets (ra/dec arcsec)

Those are all that we currently use to decide whether and how to run SuNSS exposures. [We are hoping for some lamp status]

This needs to be saved in some official place and format.