Function get_connection_create_sql 

pub(super) async fn get_connection_create_sql(
    client: &Client,
    database: &str,
    schema: &str,
    name: &str,
) -> Result<Option<String>, ConnectionError>

Get the CREATE CONNECTION SQL for an existing connection.

Uses SHOW CREATE CONNECTION which returns the canonical, non-redacted SQL including fully-qualified secret references. Returns None if the connection does not exist.