Change stats collation for LTS to the median, thereby avoiding summing overflows.

src/rust/lts_client/src/collector/collation/min_max.rs

@@ -40,9 +40,11 @@ impl<
       min = T::min(min, *n);
       max = T::max(max, *n);
     });
-    let length = stats.len();
+    let mut values = stats.to_vec();
+    values.sort();
+    let length = values.len();
     let median = if length == 0 { T::zero() } else {
-      stats[length/2]
+      values[length/2]
     };
 
     Self { max, min, avg: median(stats): median }