First sub-slice of docker launch integration: the foundation the CLI needs
to ensure exactly one orchestrator control plane + shared gateway is up
before registering/launching bottles. Does NOT touch the real launch path
yet — it's the lifecycle primitive the cut-over slices build on.
- OrchestratorProcess.ensure_running(): idempotent singleton — returns the
control-plane URL if a healthy one already answers /health, else spawns
`python -m bot_bottle.orchestrator --broker docker --gateway` detached
(start_new_session, output tee'd to <root>/orchestrator.log) and polls
/health until healthy or timeout (OrchestratorStartError).
- The control-plane port is the singleton key: a second orchestrator can't
bind it, so a stray double-start fails fast rather than forking a rival.
- Host-process (not container) per the PRD's dev-harness sequencing — it
already has the host user's docker access to broker launches; the
data-plane gateway it manages is the container.
pyright 0 errors; pylint 9.83/10; unit suite green (1714 tests; the 13
test_sidecar_init /bin/sleep errors are pre-existing NixOS-local noise).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WBMWTEtQdJ4W5UrWuLHCck
