Function start_record 

pub fn start_record(
    run: RunId,
    id: Name,
    wtype: Name,
    version: u32,
    started_ms: u64,
    deadline_ms: u64,
    parent: Option<ParentRef>,
    policy: u8,
    input: Payload,
) -> RecordBuf

A plain start record (no origin, copies or update).