Sheila, Daniel, Vicky

Given our squeezer ASC offloading issues, Sheila and I have guardianized our SQZ ASC offloading in SQZ_FC and SQZ_MANAGER. See updated graphs; currently offloading states are only selectable when ASC is not running, but this is subject to change as we go. Guardians tested while IFO was down from an earthquake, and the following states work to offload and clear ASCs. Working guardians with offloading checked into svn version 25670.

• SQZ_FC - from "DOWN", can request "FC_ASC_OFFLOADED". When FC-ASC is not running, this will first offload the FC ASC to FC1/2, ZM3 sliders, then clear history on ASC filter banks.
• SQZ_MANAGER - from "SQZ_READY_IFO" can request "SQZ_ASC_OFFLOADED". When SQZ-ASC is not running, this will offload SQZ-IFO ASC (AS42) to ZM5/6 sliders, then clear history on ASC filter banks.

I also cleaned up SQZ_MANAGER a little; now only relevant states for observing are requestable in the drop-down menu. In addition, today Daniel has LHO:69732 which makes it so we only need to accept FC1/2 + ZM slider values in SDF models once after offloading, and it saves it to both observe and safe.snaps.