// src/utils/columns.rs
pub fn is_system_column(column_name: &str) -> bool {
    match column_name {
        "id" | "deleted" | "created_at" => true,
        name if name.ends_with("_id") => true,
        _ => false,
    }
}

pub fn filter_user_columns(all_columns: Vec<String>) -> Vec<String> {
    all_columns.into_iter()
        .filter(|col| !is_system_column(col))
        .collect()
}