ci: Add version release notification workflow (#26897)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/scripts/send-version-release-notification.mjs

@@ -0,0 +1,32 @@
+import { ensureEnvVar } from './github-helpers.mjs';
+
+async function sendVersionReleaseNotification() {
+	const payload = ensureEnvVar('PAYLOAD');
+	const webhookData = ensureEnvVar('N8N_VERSION_RELEASE_NOTIFICATION_DATA');
+
+	const { user, secret, url } = JSON.parse(webhookData);
+
+	console.log('Payload: ', JSON.parse(payload));
+
+	const response = await fetch(url, {
+		method: 'POST',
+		headers: {
+			'Content-Type': 'application/json',
+			Authorization: 'Basic ' + Buffer.from(`${user}:${secret}`).toString('base64'),
+		},
+		body: payload,
+	});
+
+	const status = response.status;
+	console.log('Webhook call returned status ' + status);
+
+	if (status !== 200) {
+		const body = await response.text();
+		throw new Error(`Webhook call failed:\n\n ${body}`);
+	}
+}
+
+// only run when executed directly, not when imported by tests
+if (import.meta.url === `file://${process.argv[1]}`) {
+	sendVersionReleaseNotification();
+}