desihub/nightwatch

SP7 trace warnings present in science exposures

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@djschlegel noticed that all science exposures have a large and growing DY in SP7 (wavelength). Calibration exposures are not affected. It looks like the drift started 20240822, see the QA history plots.

Screenshot 2024-10-24 at 6 16 36 PM

The offset is fixed as of 20241101.