merge: Enable NestJS shutdown hooks for clean exit (!1145)

View MR for information: https://activitypub.software/TransFem-org/Sharkey/-/merge_requests/1145

Approved-by: dakkar <dakkar@thenautilus.net>
Approved-by: Marie <github@yuugi.dev>

packages/backend/src/queue/QueueProcessorService.ts

@@ -612,6 +612,8 @@ export class QueueProcessorService implements OnApplicationShutdown {
 
 	@bindThis
 	public async onApplicationShutdown(signal?: string | undefined): Promise<void> {
+		this.logger.info('Stopping BullMQ workers...');
 		await this.stop();
+		this.logger.info('Workers disposed.');
 	}
 }