Function suggest_entity_names 

pub fn suggest_entity_names(
    conn: &Connection,
    namespace: &str,
    query: &str,
    limit: usize,
    min_score: f64,
) -> Result<Vec<FuzzyEntityMatch>, AppError>

Rank entity names in namespace by fuzzy similarity to query.

Returns up to limit candidates with score ≥ min_score, sorted by score descending (ties break alphabetically).