pub fn estimate_difficulty(
domain: &str,
size: usize,
seed: u64,
difficulty: &str,
hard_neg_ratio: f64,
schema: &DomainSchema,
) -> Result<DifficultyReport, String>pub fn estimate_difficulty(
domain: &str,
size: usize,
seed: u64,
difficulty: &str,
hard_neg_ratio: f64,
schema: &DomainSchema,
) -> Result<DifficultyReport, String>