Improve application responsiveness and background processing

src/hooks.server.ts

@@ -3,6 +3,8 @@ import { migrate } from '$lib/server/db/migrate.js';
 import { startWorker } from '$lib/server/pipeline/worker.js';
 import { interruptDeployments } from '$lib/server/provisioning/history.js';
 import { authenticationHandle } from '$lib/server/auth/guard.js';
+import { emit } from '$lib/server/pipeline/bus.js';
+import { startPerformanceMonitor } from '$lib/server/performance.js';
 
 let booted = false;
 function boot(): void {
@@ -11,6 +13,7 @@ function boot(): void {
     migrate();
     interruptDeployments();
     startWorker();
+    startPerformanceMonitor();
 }
 
 // SvelteKit calls handle() for every request; using the first request as the
@@ -18,5 +21,13 @@ function boot(): void {
 // out-of-band init hook.
 export const handle: Handle = async (input) => {
     boot();
-    return authenticationHandle(input);
+    const started = performance.now();
+    const response = await authenticationHandle(input);
+    const elapsed = performance.now() - started;
+    response.headers.append('Server-Timing', `app;dur=${elapsed.toFixed(1)}`);
+    if (process.env.EC_PERF_LOG === 'true' && elapsed > 250 && !input.event.route.id?.startsWith('/api/agent/')) {
+        console.info('[request]', { route: input.event.route.id, method: input.event.request.method, status: response.status, elapsedMs: Math.round(elapsed) });
+    }
+    if (input.event.locals.user && !['GET','HEAD','OPTIONS'].includes(input.event.request.method) && response.status < 400) emit({ type: 'fleet-invalidated' });
+    return response;
 };