Add ulimits as a configurable advanced setting for every container,
allowing customization through the web UI. Move hardcoded ulimits
from elasticsearch and zeek into defaults.yaml and fix elasticsearch
ulimits that were incorrectly nested under the environment key.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Create /opt/so/conf/zeek/zkg directory and sync custom packages
from the manager via file.recurse. Bind mount the directory into
the so-zeek container so the entrypoint can install packages on
startup.