dex: 🧮 shift dex buckets over by a factor of 1000

`metrics` histograms use seconds as a unit of measurement, update the
bucket configuration to reflect that.

see:
* #4502
* #4464

(cherry picked from commit f35b190)

crates/core/component/dex/src/component/metrics.rs

@@ -47,22 +47,22 @@ pub fn register_metrics() {
 // These values may need to be updated over time.
 // These values are logarithmically spaced from 5ms to 250ms.
 pub const DEX_BUCKETS: &[f64; 16] = &[
-    5.,
-    6.48985018,
-    8.42363108,
-    10.93362074,
-    14.19151211,
-    18.42015749,
-    23.90881249,
-    31.03292223,
-    40.2798032,
-    52.28197763,
-    67.86044041,
-    88.08081833,
-    114.32626298,
-    148.39206374,
-    192.6084524,
-    250.,
+    0.005,
+    0.00648985018,
+    0.00842363108,
+    0.01093362074,
+    0.01419151211,
+    0.01842015749,
+    0.02390881249,
+    0.03103292223,
+    0.0402798032,
+    0.05228197763,
+    0.06786044041,
+    0.08808081833,
+    0.11432626298,
+    0.14839206374,
+    0.1926084524,
+    0.250,
 ];
 
 pub const DEX_PATH_SEARCH_DURATION: &str = "penumbra_dex_path_search_duration_seconds";