Fast-lane backlog: 'tools' package not importable (pr_preflight_engine, 14 tests)

[neuron7xLab]

Surfaced by the restored fast oracle (#1153). All 14 tests in tests/ci/test_pr_preflight_engine.py fail at COLLECTION with ModuleNotFoundError: No module named 'tools' (from tools.ci import pr_preflight). Same import-architecture class as #1158 (cli/) and #1171 (analytics/): the tools package is not declared in [tool.setuptools.packages.find], so it is absent under the CI editable install.

Drain criterion: declare tools (audit all top-level packages: cli, analytics, tools), the 14 preflight tests collect and pass under the real oracle, remove quarantine line. Quarantined in #1153.

[neuron7xLab]

Resolved & verified. This fast-lane backlog cluster is marked drained in docs/ci/fast_backlog_ledger.md (quarantine entry removed), and its verification test now runs green on main — re-confirmed locally after #1230 restored fast-lane collection (the torch-probe DeprecationWarning fix that had zeroed the lane under Python 3.11):

$ pytest tests/ci/test_pr_preflight_engine.py (20 tests)  ->  PASS

No quarantine entry remains for this cluster; a new failure would fail python-fast-shard (now real-green, not vacuous). Closing.