Function schedule 

pub(crate) fn schedule(
    mstore: Arc<Store>,
    broker: Arc<Broker>,
    block_id: String,
    record: String,
    record_pending: Arc<AtomicBool>,
    spawned_ms: i64,
)

Schedules the note for a session spawned at spawned_ms carrying record. record_pending turns false when the record goes out with the user’s first message: by then the user has spoken, and the note is dropped.