Default on, because the cache is safe by construction rather than by
convention: it engages only where a Cargo.lock exists, and refuses to publish
anything the prune assertion cannot vouch for. Two independent off switches --
the flag for one job, `enabled = false` for the host.
The store root is resolved after the environment overrides are applied, so
CI_ROOT relocates it along with everything else, while an explicit root in the
config still wins. Both directions are covered by tests.
Also asserts that the Windows branch never receives the argument at all: the
cache is Linux-only and the two branches stay separate, per AGENTS.md.
Eliminates VMware-Tools IP-detect polling (observed: 39–177 s variance on
Linux host B7 benchmark). When [ip_pool] is configured the orchestrator:
1. Allocates a slot IP from a JSON-backed pool (fcntl-locked on Linux)
2. Injects guestinfo.ip-assignment / netmask / gateway into the cloned VMX
before vmrun start
3. Skips _wait_for_ip entirely — uses the pre-assigned IP immediately
4. Releases the slot in _destroy_clone (all paths: success/failure/interrupt)
New modules / changes:
src/ci_orchestrator/ip_pool.py IpSlotPool + _file_lock context manager
src/ci_orchestrator/config.py IpPoolConfig dataclass; [ip_pool] TOML
src/ci_orchestrator/commands/job.py _inject_guestinfo_ip helper; pool wiring
tests/python/test_ip_pool.py 12 unit tests (acquire/release/persist)
tests/python/test_config.py ip_pool config parsing tests
tests/python/test_commands_job.py pool path + _inject_guestinfo_ip tests
config.example.toml [ip_pool] section (commented example)
Coverage 90.02%; mypy --strict clean.
Simone