feat(logistic-distribution): add LogisticDistribution - #172
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…and sampling Implements numerically stable PDF and CDF using a symmetric log-sigmoid decomposition (logCDF(z) + logCDF(-z)) that correctly handles ±infinity without NaN. Sampling uses the quantile function via inverse transform. Fixes: #170
JimmyMAndersson
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Implements numerically stable PDF and CDF using a symmetric log-sigmoid decomposition (logCDF(z) + logCDF(-z)) that correctly handles ±infinity without NaN. Sampling uses the quantile function via inverse transform.
Fixes: #170