547a557d0f
chatterbox-fast is authored software with a test suite, not a config-mirror stack — so it moves to its own MIT-licensed, versioned, CI'd repo (gitea vh/chatterbox-fast, v0.1.0) following the sister-repo pattern. Replace stacks/chatterbox-fast/ with a pointer README; the moved code (scheduler/app/bench/tests/Dockerfile/compose) now lives in the new repo. The deployed :8197 service is unaffected (still runs the legacy devnen-based image; self-contained-image migration is an optional follow-up). The fleet catalog entry stays in docs/asset-engine/services.yaml.