Function encode_subject_timed 

pub(crate) async fn encode_subject_timed(
    state: &TransportState,
    subject: &Subject,
    review: bool,
) -> Result<(Value, OpenTimings)>

encode_subject, carrying the session’s own open timings.

Split from the plain encode so the thirty readers that want only the value keep their call: a session’s timeline is the open path’s own business, and it is the only arm that fills one.

review is the review page’s own read: it refreshes the branch diff’s base and pins the stats and content reads to the sha that refresh found. Every other read serves what the stores hold, so a record read never waits on the network.