Merge lane base check: develop 37762bb5e11b

Merge lane base check: run the full gate on `develop` at `37762bb5e11b26115a0cd9a95888a725e77b5443` 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.

develop 37762bb5e11b RED (develop_red reported): CE mirror strict + CE tooling suite fail — hosts.py:237/389 and routes/nodes/delete.py:159/171 import node_orders/hosted_machines/vnodes, absent from the jaah-ce tree (Tasks 12059/12068/12062). Memory: none applied.