Expand the bats suite to address a second review pass:
- Assert that a containerd only warning produces a HINT that names
containerd.service and NOT docker.service, and mirror the check in
the docker only test. When both fire, assert the HINT lists both
services in a single systemctl disable invocation.
- New test: 'clean host without systemctl exits silently' — exercises
the COZYSTACK_PREFLIGHT_FORCE_NO_SYSTEMCTL=1 path when no standalone
sockets exist. Previously the tests only covered the systemd enabled
clean host, leaving the non systemd clean path unverified.
- New test: 'docker service plus socket still emits exactly one
warning' — mirrors the existing containerd service+socket test and
locks in the gated check in check_docker.
- Replace silent 'return 0' on missing python3 with a visible
'# SKIP: python3 unavailable' message on stderr so CI logs make it
obvious which tests were skipped on a given runner.
Assisted-By: Claude <noreply@anthropic.com>
Signed-off-by: Aleksei Sviridkin <f@lex.la>
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