Function attempt_notice 

fn attempt_notice(
    worker: &SessionSlot,
    died_at: SystemTime,
    diagnostic: &str,
    attempt: u32,
    attempts: usize,
    outcome: &Result<Option<String>, String>,
) -> String

The notice one worker death earns: the instant, the diagnostic, the attempt and what it did. The seat is named the way an envelope names it, so the lead can address it back.