Add Metrics tab with historical server utilization and map capacity

src/lib/server/pipeline/worker.ts

@@ -11,6 +11,8 @@ import { restartSettling } from './restart-rollout.js';
 import { classifyHealth } from '../fleet/health.js';
 import { isProvisioning } from '../fleet/provisioning.js';
 import { STATUS_REFRESH_MS } from '../../server-freshness.js';
+import { recordMetrics } from '../fleet/metrics.js';
+import { selectedZombieMap } from '../../map-aliases.js';
 
 const TICK_MS = 15_000;
 // Cap concurrent UDP RCON calls so a 15-server fleet doesn't blast the
@@ -68,6 +70,7 @@ async function refreshStatus(): Promise<void> {
     if (servers.length === 0) return;
 
     const entries: ServerStatusEntry[] = new Array(servers.length);
+    const capacities = new Map<string, number | null>();
     let cursor = 0;
 
     async function pump(): Promise<void> {
@@ -119,6 +122,7 @@ async function refreshStatus(): Promise<void> {
             const now = new Date().toISOString();
 
             if (result.ok) {
+                capacities.set(srv.name, result.status.capacity ?? null);
                 // Compare against the previously persisted count BEFORE we
                 // overwrite last_players — occupancy transitions are anchored
                 // to that boundary.
@@ -203,6 +207,16 @@ async function refreshStatus(): Promise<void> {
     }
     await Promise.all(Array.from({ length: STATUS_CONCURRENCY }, pump));
 
+    try {
+        recordMetrics(servers.map((srv, i) => ({
+            server: srv.name,
+            game: srv.game ?? 'unknown',
+            map: selectedZombieMap(srv.game, entries[i].map ?? srv.map, srv.map_slug)?.friendly ?? entries[i].map ?? srv.map ?? 'Unknown map',
+            players: capacities.has(srv.name) ? entries[i].players : null,
+            capacity: capacities.get(srv.name) ?? null
+        })));
+    } catch (err) { console.error('[worker] metrics error:', err); }
+
     emit({ type: 'server-status', entries });
 }