Merge lane base check: develop 7beb88656664

Merge lane base check: run the full gate on `develop` at `7beb88656664ad6efeddb57cb8383e57e058c319` 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 of develop 7beb88656664: develop_red, reported by merge_lane.py run. Two failing tests, apps/web/e2e/plan-providers.spec.ts:31 and :42 (toBeInViewport, names not whole), failed again on a focused rerun. Likely PR #6887. Nothing merged. Memory: none applied.