- ContainerScalePolicy model (per-app: enabled, service_name, min/max
replicas, cpu high/low %, cooldown, current_replicas).
- ContainerScaleService: evaluate() scales a compose service up/down by one
replica when average CPU crosses the high/low thresholds, within bounds and
outside the cooldown; scale_to() for manual; sweep() for cron. Uses
`docker compose --scale`; local + scale-capable services only.
- apps.py: GET/PUT /<id>/scale-policy, POST /<id>/scale,
POST /<id>/scale/evaluate, POST /scale-sweep (admin).
- 10 tests: bounds clamping, scale up/down, hold-at-max, cooldown, disabled,
unknown-cpu, manual endpoint, auth.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
