feat(schedules): replace hardcoded cron schedule with CLEANUP_CRON_JOB constant

- Updated the cron schedule for Docker cleanup tasks across multiple files to use the new CLEANUP_CRON_JOB constant.
- This change enhances maintainability by centralizing the cron schedule configuration, ensuring consistency across the application.

apps/schedules/src/utils.ts

@@ -1,4 +1,5 @@
 import {
+	CLEANUP_CRON_JOB,
 	cleanupAll,
 	findBackupById,
 	findScheduleById,
@@ -125,7 +126,7 @@ export const initializeJobs = async () => {
 		scheduleJob({
 			serverId,
 			type: "server",
-			cronSchedule: "0 0 * * *",
+			cronSchedule: CLEANUP_CRON_JOB,
 		});
 	}