Merge lane base check: develop 5d90fc3cc95f

Merge lane base check: run the full gate on `develop` at `5d90fc3cc95fcfbe520130e4b80fa25e1e82c098` 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 5d90fc3 RED (reported develop_red): mirror sensitive-content check finds 7 internal-path refs in shipped files — jaah_cli.py/pkgmgr_loader.py (Task 11109) and templates gallery TSX → ui-style-guide.md (Task 11074). Memory: none applied.