Function render 

pub fn render(rows: &[Row]) -> String

Render a snapshot as a plain-text table.

Milliseconds with one decimal, because the interesting differences here are tens of milliseconds (a sidecar hop) and microsecond precision would just be noise from the scheduler.

Both the success and the failure columns are shown. Reading ok without err is how a backend that fails half its calls in 2 ms gets mistaken for a fast one.