Merge lane base check: develop 92c15c744131

Merge lane base check: run the full gate on `develop` at `92c15c744131f490bbd2a821f7e6d1d5f2af5434` 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 92c15c744131: RED (develop_red reported by merge_lane.py run). Full gate 57328 passed / 1 failed; fails again alone: tests/test_launch_failures.py::test_a_second_launch_failed_moves_the_resume_off_the_node (slot 'task' != 'free'). Nothing merged/ejected. Memory: none applied.