Merge lane base check: develop 95f0423c7d52

Merge lane base check: run the full gate on `develop` at `95f0423c7d52e3ee3362cc2529e143c56af5ad15` 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 95f0423c7d52 RED (develop_red reported): 4 tests in test_dispatch_compose_providers.py fail on their own — folder-slot Finish prompt names 'PR', likely from c10f8140c7 (#7501, _EPIC_SUMMARY_CONTENT). Memory: none applied