OrchestratorService wasn't the orchestrator — it's the host-side lifecycle of
the docker infra *container* (the one that runs the Orchestrator). It read as
"the orchestrator as a service" and lived in orchestrator/lifecycle.py, while
its siblings (macOS MacosInfraService, Firecracker infra_vm) live under their
backend package. Rename it DockerInfraService and move it to
backend/docker/infra.py alongside the docker backend, with its docker-only
constants (INFRA_*/ORCHESTRATOR_* image + container names, daemon list, mount
paths).
orchestrator/lifecycle.py keeps only the backend-neutral pieces the other infra
services share — DEFAULT_PORT, DEFAULT_STARTUP_TIMEOUT_SECONDS,
OrchestratorStartError, source_hash — which macOS / firecracker / client still
import from there. backend/docker/infra.py imports those (backend -> orchestrator
is an allowed direction). Renamed the unit test to test_docker_infra.py.
Full unit suite green (2243).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
