[metrics] Better latency buckets for db operations (#20873)

* Remove buckets in 10+ seconds range
* Add fine grain buckets in sub-millisecond range where most of normal
latencies are

crates/typed-store/src/metrics.rs

@@ -19,7 +19,10 @@ thread_local! {
 }
 
 const LATENCY_SEC_BUCKETS: &[f64] = &[
-    0.001, 0.005, 0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 1., 2.5, 5., 10., 20., 30., 60., 90.,
+    0.00001, 0.00005, // 10 mcs, 50 mcs
+    0.0001, 0.0002, 0.0003, 0.0004, 0.0005, // 100..500 mcs
+    0.001, 0.002, 0.003, 0.004, 0.005, // 1..5ms
+    0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 1., 2.5, 5., 10.,
 ];
 
 #[derive(Debug, Clone)]