Fixing RADMAX Bug in VEGAS

[matthew-w-lundy]

RADMAX was being improperly set in some VEGAS files. This appears to be due to an error where Model3DThetaSquareCut was always being read regardless of the reconstruction set by the user. I've now passed reco_type to the appropriate section and ensured that it matches.

I tested runlist and file type import and tried with improper and proper reco_type and it all appears to be working well.

Example test:
v2dl3-vegas -d --point-like -r 2 -f /homes/wang/lundym/debuggingforothers/bryan/20260218/103110.root /raid/reedbuck/lundym/irf_alloff/ea_ITMgeo_24s_CARE162d12_v259rc0v2p1GT_alloff_Z0-60_s700_W1p1_L1p3_MH7_ThSq0p005_4nsb.root out
gives:
RAD_MAX = 0.07071067811865475 / Direction cut applied [deg]

and the command (note -r 1):
v2dl3-vegas -d --point-like -r 1 -f /homes/wang/l undym/debuggingforothers/bryan/20260218/103110.root /raid/reedbuck/lundym/irf_alloff/ea_ITMgeo_24s_CAR E162d12_v259rc0v2p1GT_alloff_Z0-60_s700_W1p1_L1p3_MH7_ThSq0p005_4nsb.root out
and returns
RAD_MAX = 360.0 / Direction cut applied [deg]

The behavior now forces the user to correctly match the reconstruction to the right IRF. Currently there is no check that does this but it may be nice to include.

[matthew-w-lundy]

@copilot , @njucarlchen comments?

[matthew-w-lundy]

Ok lets ignore the copilot its doing a little too much for whats needed here .... maybe @njucarlchen you can download and run a run to see if it works for you and then we can merge. The failing of the CI is intended and it's all due to the correct RADMAX

[njucarlchen]

I ran two simple tests.

First, I converted a stage5 file using v2dl3-vegas -d --point-like -r 2 -f data/112774.St5ITMgeo.med.v2_6_1_1.root irfs/ea_ITMgeo_25s_CARE162d12_v259rc0v2p1GT_alloff_Z0-60_s700_W1p1_L1p3_MH7_ThSq0p005_4nsb.root . and found RAD_MAX = 0.07071067811865475

Then, I also tried converting the same file using a larger theta square v2dl3-vegas -d --point-like -r 2 -f data/112774.St5ITMgeo.med.v2_6_1_1.root irfs/ea_ITMgeo_25s_CARE162d12_v259rc0v2p1GT_alloff_Z0-60_s700_W1p1_L1p3_MH7_ThSq0p0625_4nsb.root . and found RAD_MAX = 0.25

So the fix seems to be working as expected!