Merge lane base check: develop e66599059270

Merge lane base check: run the full gate on `develop` at `e665990592709b4de45d404ff8b5aedf1c3b9533` 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 e66599059270 red: full gate failed Frontend unit (vitest) — useEditRecord > with a cacheKey > hands onLoad initialData at once, then the read behind it. develop_red reported by merge_lane.py run; queue empty.