adding graceful exit
This MR adds a try/except block to allow graceful exit with CTRL+C while the submission is sleeping.
Security Notice: GitLab has uncovered a widespread malicious npm supply-chain attack that potentially can destroy user data. All teams are required to audit packages. Further information can be found under the Computer Security Report for November 2025 and the original blog post in https://about.gitlab.com/blog/gitlab-discovers-widespread-npm-supply-chain-attack/
This MR adds a try/except block to allow graceful exit with CTRL+C while the submission is sleeping.