Add interaction info to flat GENIE tree

[linyan-w]

Description

For enhanced samples (nue, NCpi0, etc), a way to identify them in standard stream CAFs are necessary to scale & merge the enhanced samples. In principal all the info is there in the EventRecord in CAF files. This PR adds more variables to flat CAFs for easier check.

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[kjplows]

Hi @PetrilloAtWork , just a ping to check if these additions to the flat GENIE tree in the flat CAFs look good to you?
(these map directly to the ScatteringType and InteractionType GENIE uses, the documentation @linyan-w added points to that). Thanks!

[kjplows]

trigger build LArSoft/lar*@LARSOFT_SUITE_v10_10_03

[FNALbuild]

✔️ CI build for LArSoft Succeeded on slf7 for e26:prof -- details available through the CI dashboard

[FNALbuild]

✔️ CI build for LArSoft Succeeded on slf7 for c14:prof -- details available through the CI dashboard

[FNALbuild]

❌ CI build for ICARUS Failed at phase build ICARUS on slf7 for c14:prof -- details available through the CI dashboard

🚨 For more details about the failed phase, check the build ICARUS phase logs

parent CI build details are available through the CI dashboard

[FNALbuild]

❌ CI build for SBND Failed at phase build SBND on slf7 for c14:prof -- details available through the CI dashboard

🚨 For more details about the failed phase, check the build SBND phase logs

parent CI build details are available through the CI dashboard

[FNALbuild]

⚠️ CI build for SBND Warning at phase ci_tests SBND on slf7 for e26:prof - ignored warnings for build -- details available through the CI dashboard

🚨 For more details about the warning phase, check the ci_tests SBND phase logs

parent CI build details are available through the CI dashboard

[FNALbuild]

❌ CI build for ICARUS Failed at phase ci_tests ICARUS on slf7 for e26:prof - ignored warnings for build -- details available through the CI dashboard

🚨 For more details about the failed phase, check the ci_tests ICARUS phase logs

parent CI build details are available through the CI dashboard

[PetrilloAtWork]

Some changes suggested.
Nothing critical, feel free to push back if you don't agree.
(but please do fix the alignment)

[linyan-w]

Some changes suggested. Nothing critical, feel free to push back if you don't agree. (but please do fix the alignment)

Thanks for the suggestions! All sound great and adopted.