Paginate beta history and refresh pages from events

src/lib/server/pipeline/bus.ts

@@ -46,6 +46,7 @@ export type BetaStage =
 export type BetaState = 'running' | 'ready-promote' | 'promoted' | 'rolled-back';
 
 export type PipelineEvent =
+    | { type: 'beta-changed'; betaId: number }
     | { type: 'fleet-invalidated' }
     | { type: 'server-telemetry'; entries: GameTelemetry[] }
     | { type: 'deployment-opened'; deploymentId: string; action: string; servers: string[] }
@@ -79,6 +80,15 @@ class Bus extends EventEmitter {
 }
 
 const bus = new Bus();
+const changedBetas = new Set<number>();
+export function invalidateBeta(betaId: number): void {
+    const scheduled = changedBetas.size > 0;
+    changedBetas.add(betaId);
+    if (!scheduled) queueMicrotask(() => {
+        const ids = [...changedBetas]; changedBetas.clear();
+        for (const betaId of ids) bus.emit('event', { type: 'beta-changed', betaId });
+    });
+}
 let invalidationPending = false;
 export function invalidateFleet(): void {
     if (invalidationPending) return;
@@ -90,6 +100,7 @@ export function invalidateFleet(): void {
 export function emit(event: PipelineEvent): void {
     bus.emit('event', event);
     if (event.type === 'beta-opened' || event.type === 'beta-state' || event.type === 'beta-server-stage') invalidateFleet();
+    if ('betaId' in event && event.type !== 'beta-changed') invalidateBeta(event.betaId);
 }
 
 export function subscribe(listener: (event: PipelineEvent) => void): () => void {