Observed pre-existing intermittent tracker race

This file records an earlier unrelated timing observation; it is not the final DGR-001 verification result.

Test:

tests/test_tracker_routing.py::test_tracker_dashboard_can_cancel_inflight_proxy

One earlier full-suite run produced:

1 failed, 745 passed, 13 skipped

A five-run isolated retry matrix reproduced the same rate on both branches:

DGR-001 branch: 4/5 passed, 1/5 failed
clean d904c40:  4/5 passed, 1/5 failed

The final full-suite run on the exact hardened DGR-001 state completed green:

749 passed, 13 skipped in 251.42s

The earlier race was therefore timing-sensitive, pre-existing, and unrelated to the DGR-001 benchmark/contract files.