Function vorarbeiter::shutdown_process

pub fn shutdown_process(
    child: &mut Child, 
    kill_timeout: Duration, 
    poll_interval: Duration
) -> Result<ExitStatus>

Shuts down a process using SIGTERM, sending SIGKILL after timeout.

First sends a SIGTERM to the child process and polls it for completion every poll_interval. If the process does not finish within kill_timeout, sends a SIGKILL.