Derive request timeout from update interval

requestTimeout is now updateInterval - 50ms, ensuring requests
complete before the next tick. maxLatency matches requestTimeout.

src/main.js

@@ -10,8 +10,12 @@ import "./styles.css";
 const CONFIG = Object.freeze({
     updateInterval: 3000,
     historyDuration: 300,
-    requestTimeout: 1500,
-    maxLatency: 1500,
+    get requestTimeout() {
+        return this.updateInterval - 50;
+    },
+    get maxLatency() {
+        return this.requestTimeout;
+    },
     graphMaxLatency: 1000,
     yAxisTicks: [0, 250, 500, 750, 1000],
     xAxisTicks: [0, 60, 120, 180, 240, 300],