Update util/api_key_helper_unix.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: appleboy

util/api_key_helper_unix.go

@@ -71,6 +71,11 @@ func GetAPIKeyFromHelper(ctx context.Context, helperCmd string) (string, error)
 
 	case <-ctx.Done():
 		// Timeout or cancellation: terminate the process group gracefully, then forcefully
+		if cmd.Process == nil {
+			// Process handle not initialized; wait for cleanup and report timeout
+			<-done
+			return "", fmt.Errorf("api_key_helper command timed out after %v", HelperTimeout)
+		}
 		pgid := cmd.Process.Pid
 
 		// First attempt: send SIGTERM to the entire process group for graceful shutdown