Function compute_distribution_statistics 

pub fn compute_distribution_statistics(
    results: &mut AnalysisResults,
    lf: &LazyFrame,
    sample_size: Option<usize>,
    seed: u64,
    polars_streaming: bool,
) -> Result<()>

Computes distribution statistics for numeric columns.

• Infers distribution types for numeric columns missing distribution_info
• Computes advanced statistics (skewness, kurtosis, outliers) if missing
• Generates distribution_analyses for columns with detected distributions