adds round telemetry support

src/lib/ui/stores/servers.ts

@@ -1,5 +1,8 @@
 import { writable, readonly } from 'svelte/store';
 import { browser } from '$app/environment';
+import type { RoundTelemetry } from '$lib/telemetry.js';
+
+export const telemetryByServer = writable<Map<string, RoundTelemetry>>(new Map());
 
 export interface RosterPlayer {
     num: number | null;
@@ -49,6 +52,14 @@ let source: EventSource | null = null;
 export function startServerStream(): void {
     if (!browser || source) return;
     source = new EventSource('/api/events/servers');
+    source.addEventListener('server-telemetry', (evt) => {
+        const data = JSON.parse((evt as MessageEvent).data) as { entries: RoundTelemetry[]; snapshot?: boolean };
+        telemetryByServer.update((previous) => {
+            const next = data.snapshot ? new Map<string, RoundTelemetry>() : new Map(previous);
+            for (const entry of data.entries) next.set(entry.server, entry);
+            return next;
+        });
+    });
     source.addEventListener('server-status', (evt) => {
         const data = JSON.parse((evt as MessageEvent).data) as { entries: ServerStatus[] };
         statusByServer.update(() => {