Move to updated PID model, add track dt/dt fit info

[michaelmackenzie]

This follows PRs Mu2e/MLTrain#9 and Mu2e/ArtAnalysis#8 to update the input PID model and to also add an optional branch with the track dt/dt fit results. I added rooutil information as well and a test script plotting the results.

[AndrewEdmonds11]

Looks great! Thanks, Michael. Could you also add the new branch to the ntuplehelper and recreate branches.md? Thanks

[michaelmackenzie]

Looks great! Thanks, Michael. Could you also add the new branch to the ntuplehelper and recreate branches.md? Thanks

I just added this, thanks for reminding me!

[oksuzian]

Issues in PR #386:

1. Branch misalignment risk (src/EventNtupleMaker_module.cc) — when the DtDt handle is invalid or shorter than the KalSeedPtr collection, nothing is pushed, so trkdtdt ends up shorter/misaligned with trk. RooUtil assumes 1:1. Fix: default-fill a TrkDtDtInfo for missing entries.

2. handle->at(i_kseedptr) can throw — if the DtDt collection is valid but smaller than the seed collection.

3. branches.md regression — regenerated from an older base; drops previously-merged Calorimeter/CRV/Trigger docs (field tables, calohitsmc alignment warning, trigger array explanation).

4. Empty CRV explanation columns — crvpulses, crvdigis, crvpulsesmc rows now have blank explanations in branches.md.

5. Wrong leaf link — crvpulsesmc now points to CrvPulseInfoReco.hh (reco) instead of an MC struct.

6. Missing trkDtDtTag on De fit config (fcl/prolog.fcl) — with fillTrkDtDt set globally true, fit branches lacking a trkDtDtTag get an empty tag → invalid handle → misaligned/empty branch.