Use WFS data

[hugobuddel]

We should apparently use information from the wavefront sensors.

See e.g. #140, #135, #133, #137, #145, #152, and email chain (info to be copied here).

[hugobuddel]

Discussed in the 2023/07/19 meeting.

To clarify: We want to use data from the Wavefront Sensor Field Selector (WFS-FS), which is a movable mirror in the SCAO system that positions the guide stare on the Pyramid sensor. This is not so much data.

Since it is a movable mirror it probably has an OPTI number as well.

We decided it is probably a good idea to use this data.

[hugobuddel]

We now use the WFS-FS position information in most of the recipes in the DRLD.

To be done (perhaps after FDR):

• verify that we indeed use this everywhere it should be used
• define what these header keywords actually are