feat(API): Report unhandled app crashes to Sentry (#4548)

* SIGTERM/SIGINT should only be handled once

* move error-handling initialization to commands

* create a new `sleep` function in workflow utils

* detect crashes and report them to Sentry

packages/cli/src/CrashJournal.ts

@@ -0,0 +1,33 @@
+import { existsSync } from 'fs';
+import { mkdir, utimes, open, rm } from 'fs/promises';
+import { join, dirname } from 'path';
+import { UserSettings } from 'n8n-core';
+import { ErrorReporterProxy as ErrorReporter, LoggerProxy, sleep } from 'n8n-workflow';
+
+export const touchFile = async (filePath: string): Promise<void> => {
+	await mkdir(dirname(filePath), { recursive: true });
+	const time = new Date();
+	try {
+		await utimes(filePath, time, time);
+	} catch {
+		const fd = await open(filePath, 'w');
+		await fd.close();
+	}
+};
+
+const journalFile = join(UserSettings.getUserN8nFolderPath(), 'crash.journal');
+
+export const init = async () => {
+	if (existsSync(journalFile)) {
+		// Crash detected
+		ErrorReporter.warn('Last session crashed');
+		LoggerProxy.error('Last session crashed');
+		// add a 10 seconds pause to slow down crash-looping
+		await sleep(10_000);
+	}
+	await touchFile(journalFile);
+};
+
+export const cleanup = async () => {
+	await rm(journalFile, { force: true });
+};