JM1 looks good in transfer functions and is ready for doors!

We wanted to verify that our current offsets for JM1 (specifically Y:-840) is not near the edge of our physical range or DAC range.

Initially I had tried taking transfer functions for JM1 with the OPTICALIGN offsets ON, but that limits the amount we can drive so as to not saturate, but that then gives us really bad coherence (and purge air doesn't help). Luckily we can still see the peak locations, and since the frequencies haven't shifted, that means that we aren't close to touching.
I then compared the MASTER_OUTs for JM1 and RM2 (who also has a large OPTICALIGN Y: +935) with the offsets ON. The signal chain for these two are the same so they should be comparable. I found that RM2 has a higher min/max in the MASTER_OUTs, and that value is only half the max DAC range, so JM1 is also fine DAC-range-wise.

After confirming that I turned the OPTICALIGN offsets OFF and took transfer functions. They look good and match the initial set taken in December! 

Settings:
- ISI LOCKED
- DAMP OFF
- OPTICALIGN OFF (too hard to get good coherence without saturating with offsets on)
Data:
/ligo/svncommon/SusSVN/sus/trunk/HTTS/H1/JM1/SAGM1/Data/2026-02-26_0015_H1SUSJM1_M1_WhiteNoise_{L,P,Y}_0p02to50Hz.xml
Results:
/ligo/svncommon/SusSVN/sus/trunk/HTTS/H1/JM1/SAGM1/Results/2026-02-26_0015_H1SUSJM1_M1_ALL_TFs.pdf
r12924
Comparison:
/ligo/svncommon/SusSVN/sus/trunk/HTTS/Common/Data/allhttss_2026-02-26_JM1_Dec2025vsFeb262026_ALL_TFs.pdf
r12927

*The jump in magnitude between these measurements and the previous is due to a factor of 4 that accidentally got removed. See 89198