TPC TimeSeries: fix silent track loss from binning overflow - #15658
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Bin indices for tgl, phi, qPt, and multiplicity were used as implicit track selection cuts: tracks outside histogram range were silently dropped (return). Replace with std::clamp — edge bins become overflow bins (standard ROOT convention). No change for tracks within range.
Bug: changing --max-qPt or --mult-max removed tracks from ALL outputs (DCA, dEdx, etc.), not just the binned histograms.