Every PR of the startup batch adds a different tools/profile_client_startup.py,
so any two of them conflict. This one measures only Behaviours::load, so it
becomes tools/profile_behaviour_cache.py, and --cache-dir passes the snapshot
folder to the example so warm loads can be measured.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Ludovic Marie