test(cli): cover shutdown timer invariants

apps/cli/src/process-shutdown.ts

@@ -30,6 +30,7 @@ export function createProcessShutdown(
   const exitOnce = (code: number): void => {
     if (exited) return
     exited = true
+    /* v8 ignore else -- shutdown() arms the timer before any asynchronous exit path can run. */
     if (timeout !== undefined) clearTimeout(timeout)
     exit(code)
   }