test_compose asserts the new decnet.topology.* labels land on both base
deckies (role=base, no service marker) and service fragments
(service=true). The stub docker client in test_deploy grew a filters
kwarg so it keeps matching the real .networks.list(filters=...) call
signature now used by the deployer.
Covers dry-run compose emission (no status change), FAILED transition
with reason logged on daemon errors, teardown from FAILED, and a
live-marked end-to-end test that creates/removes bridge networks
against a real docker daemon (skipped on CI).
