Add a note about assuaging a security concern

docs/endpoints/configs/ospool.yaml

@@ -6,6 +6,8 @@ engine:
   # This config uses apptainer containerization to ensure a consistent
   # python environment on the worker side. Since apptainer limits writable
   # directory paths, set working directory paths paths used by the worker to /tmp
+  # P.S: These filepaths remain private to the container and will not be
+  #      accessible on the host system
   worker_logdir_root: /tmp/logs
   working_dir: /tmp/tasks_dir