Associations need to be used with accounting for weight

This is prompted by @bspage912's notes from last tracking meeting https://indico.bnl.gov/event/28056/contributions/107199/attachments/61685/105906/tracksInJets_trackingMeeting_2025-05-08.pdf

https://github.com/eic/tutorial-analysis/blob/801998d6adcddfd33c973c8fab34ee5b99366b66/_episodes/03-analysis.md#efficiency-analysis
https://github.com/eic/tutorial-analysis/blob/801998d6adcddfd33c973c8fab34ee5b99366b66/_episodes/03-analysis.md#efficiency-analysis-1

For most analyses, association with the largest weight should be used, not all possible associations.

Probably warrants a comment in here too:
https://github.com/eic/tutorial-analysis/blob/801998d6adcddfd33c973c8fab34ee5b99366b66/_extras/branch_dictionary.md?plain=1#L61