message: Make SourceType and SourceConn clonable
diff: @@ -4,7 +4,7 @@ use anyhow::anyhow;
  use std::convert::TryFrom;
  use url::Url;
  -#[derive(Debug)]
  +#[derive(Debug, Clone)]
  pub enum SourceType {
  Postgres,
  SQLite,
  @@ -15,6 +15,7 @@ pub enum SourceType {
  DuckDB,
  }
  +#[derive(Debug, Clone)]
  pub struct SourceConn {
  pub ty: SourceType,
  pub conn: Url,
  