refactor: update _handle_interrupt to prompt resubmission

fix: correct return type annotation from 'none' to 'None'

refactor: simplify job monitoring and resubmission flow

refactor: update monitor() to return Optional[bool] for status

fix: update KeyboardInterrupt handler to print message and return None

feat: add interactive job monitoring with resubmission and exit

fix: handle three-state monitor result to avoid infinite prompt loop

refactor: clarify job monitoring loop

refactor: simplify prompt logic with resume_after_timeout boolean

refactor: split prompt_for_next_step

refactor: update job monitor to return string literal statuses

refactor: clean up JobManager by removing redo_enabled

fix: update job monitoring logic to use status strings