[PWGLF] switch TH1F to TH1D for high-count histograms #11104
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Changed several histograms from TH1F to TH1D in cases where the expected number of counts may exceed 2^(24). This prevents potential precision loss or overflow issues in bins with very high statistics.
TH1F uses 32-bit floats, which lose precision when bin counts exceed ~16 million -- small increments may be ignored. Switching to TH1D (64-bit) ensures accurate bin content in high-statistics cases.