Merge lane base check: develop 8fbf83088ed5

Merge lane base check: run the full gate on `develop` at `8fbf83088ed586eea32864412a559be886e1993d` alone and report it certified or red: nothing had certified it since the last attempt. A red verdict files a fix task; it never holds the lane. Filed by the control plane (`app/merge_lane.py::_certify_idle`). How: run `python3 tools/merge_lane.py run` once. It takes this check's batch, gates that commit with the full gate in its sandbox and reports `certified` or `develop_red` itself. Never run the gate by hand: a hand-run green reports nothing, so no certificate is recorded (Task 6722).

Base check develop 8fbf83088ed5: RED (develop_red reported by merge_lane.py run). 12 deterministic API-unit failures in tests/test_console_places.py (route/guard tables), likely from #6944 (Task 10131). Nothing merged/ejected; fix task filed by CP. Memory: none applied.