Function count_unreachable_run_since 

pub async fn count_unreachable_run_since(
    conn: &mut PgConnection,
    since: DateTime<Utc>,
) -> ModelResult<SuotarFailureRun>

The unbroken run of “Suotar did not answer usefully” at the end of the window. A transport failure carries no HTTP status, which is how it is told from a refusal Suotar composed itself.