Merge lane base check: develop 23bcafc7e4de

Merge lane base check: run the full gate on `develop` at `23bcafc7e4de9558d4fa9d5af798eda37c8b60df` 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 23bcafc7e4de: RED (develop_red reported by merge_lane.py run). 4 tests fail deterministically in tests/test_node_orders.py: payload gained hypervisor/hypervisor_blocker keys (likely Task 10053). Nothing queued; nothing merged/ejected. Memory: none applied.