pub fn append(
store: &Store,
op: &str,
tick: Option<&Tick>,
verdict: Option<&str>,
masked_stale: Option<&str>,
)Expand description
Append one event line: {ts, op, tick_id?, source_ref?, age?, verdict?, masked_stale?}. When a
deciding tick is given it contributes the join key (source_ref) and a coarse decision-AGE bucket
— together the prior-decision discriminator the metrics framework needs: a check firing on an OLD
decision is a prior-decision resurface; on a just-written one it is not. masked_stale carries a
stale sub-kind that the (worse) per-tick verdict hides, so a staleness-mask never silently drops.