perf(core): Batch raw insights save and add metadata cache (#14261)

Co-authored-by: Danny Martini <danny@n8n.io>

packages/@n8n/benchmark/scenarios/multiple-webhooks/multiple-webhooks.script.js

@@ -0,0 +1,19 @@
+import http from 'k6/http';
+import { check } from 'k6';
+
+const apiBaseUrl = __ENV.API_BASE_URL;
+
+export default function () {
+	const urls = Array(10)
+		.fill()
+		.map((_, i) => `${apiBaseUrl}/webhook/multiple-webhook${i + 1}`);
+
+	const res = http.batch(urls);
+
+	for (let i = 0; i < res.length; i++) {
+		// Check if the response status is 200
+		check(res[i], {
+			'is status 200': (r) => r.status === 200,
+		});
+	}
+}