[PWGJE] trackEfficiency: add track pT-eta-phi histogram to track QA

Adds a three-dimensional histogram of track pT, eta and phi to the
track QA, so that the azimuthal distribution of the track sample can be
inspected in pT slices. It is booked together with the other histograms
of the track QA processes and filled in fillTrackHistograms, following
the inline axis definitions used in that block.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017xzpJe4BMMjS3m14A9w8V4

Author: Joonsuk Bae

PWGJE/Tasks/trackEfficiency.cxx

@@ -167,6 +167,7 @@ struct TrackEfficiency {
       registry.fill(HIST("h2_track_pt_high_track_sigma1overpt"), track.pt(), track.sigma1Pt(), weight);
       registry.fill(HIST("h2_track_pt_high_track_sigmapt"), track.pt(), track.sigma1Pt() * track.pt(), weight);
       registry.fill(HIST("h3_intrate_centrality_track_pt"), collision.hadronicRate(), centrality, track.pt(), weight);
+      registry.fill(HIST("h3_track_pt_track_eta_track_phi"), track.pt(), track.eta(), track.phi(), weight);
     }
   }
 
@@ -334,6 +335,7 @@ struct TrackEfficiency {
       registry.add("h2_track_pt_track_sigma1overpt", "#sigma(1/#it{p}_{T}); #it{p}_{T,track} (GeV/#it{c})", {HistType::kTH2F, {{100, 0., 10.}, {10000, 0.0, 1.0}}});
       registry.add("h2_track_pt_high_track_sigma1overpt", "#sigma(1/#it{p}_{T}); #it{p}_{T,track} (GeV/#it{c})", {HistType::kTH2F, {{90, 10., 100.}, {10000, 0.0, 1.0}}});
       registry.add("h3_intrate_centrality_track_pt", "interaction rate vs centrality vs track pT; int. rate; centrality; #it{p}_{T,track} (GeV/#it{c})", {HistType::kTH3F, {intRateAxis, centAxis, {200, 0., 200.}}});
+      registry.add("h3_track_pt_track_eta_track_phi", "track pT vs track #eta vs track #varphi; #it{p}_{T,track} (GeV/#it{c}); #eta_{track}; #varphi_{track}", {HistType::kTH3F, {{200, 0., 200.}, {100, -1.0, 1.0}, {160, -1.0, 7.}}});
     }
 
     if (doprocessParticles || doprocessParticlesWeighted) {