Function corrected_distance 

pub fn corrected_distance(
    hamming: u32,
    query_norm: f32,
    vec_norm: f32,
    dimensions: usize,
) -> f32

Compute corrected distance for binary quantization

Raw Hamming distance gives rough ranking. Correction using norms approximates true L2 distance for better accuracy.

Formula: corrected = hamming * (query_norm * vec_norm) / dimensions