Draft: B+ -> J/ψ K+ Early 2024 Data for electron and muon tracking efficiencies studies

MR for tracking efficiencies studies with early 2024 data (https://mattermost.web.cern.ch/lhcb/pl/jh4k8wbgtjdi8rep4hn5xiy6aw) corresponding to BK path: /LHCb/Collision24/Beam6800GeV-VeloClosed-MagDown-Excl-UT/Real Data/Sprucing24c1/95100000/

For now it corresponds to the fill 9512, and other fills show follow satisfying keep_running: True.