refactor: Workers and queues and eliminate redundant process listeners

packages/backend/src/workers/remove-cancelled-subscriptions.ee.js

@@ -1,12 +1,11 @@
 import { Worker } from 'bullmq';
-import process from 'node:process';
 import { DateTime } from 'luxon';
 import * as Sentry from '../helpers/sentry.ee.js';
 import redisConfig from '../config/redis.js';
 import logger from '../helpers/logger.js';
 import Subscription from '../models/subscription.ee.js';
 
-export const worker = new Worker(
+const removeCancelledSubscriptionsWorker = new Worker(
   'remove-cancelled-subscriptions',
   async () => {
     await Subscription.query()
@@ -23,13 +22,13 @@ export const worker = new Worker(
   { connection: redisConfig }
 );
 
-worker.on('completed', (job) => {
+removeCancelledSubscriptionsWorker.on('completed', (job) => {
   logger.info(
     `JOB ID: ${job.id} - The cancelled subscriptions have been removed!`
   );
 });
 
-worker.on('failed', (job, err) => {
+removeCancelledSubscriptionsWorker.on('failed', (job, err) => {
   const errorMessage = `
     JOB ID: ${job.id} - ERROR: The cancelled subscriptions can not be removed! ${err.message}
     \n ${err.stack}
@@ -42,6 +41,4 @@ worker.on('failed', (job, err) => {
   });
 });
 
-process.on('SIGTERM', async () => {
-  await worker.close();
-});
+export default removeCancelledSubscriptionsWorker;