The slice-2b commit (6f0de7a) repointed cli/component.nu and cli/components_cluster.nu
to domain/cluster/introspect.nu but did not stage the file itself — HEAD imported a
module absent from the repo. Add it.
Also prune the verbs file: components_cluster.nu inherited the full preamble from the
slice-1 copy; now that it holds only the 5 `main cluster *` verbs, 10 unused `use`
lines (orchestrator, run_taskserv, templates, service_check, context_assembler, state,
user/config, ncl-eval, mod.nu *) and 2 over-broad name lists are dead. Trimmed to the
4 imports the verbs actually use.
Verified: module-load of all cli/domain cluster modules; cluster --help + component
list run.
