Notes on verification

Confirmed by official GCTC website, Russian Presidential Library, Rossiyskaya Gazeta, and multiple independent sources agreeing on date, order-giver, and his rank at the time. [cascade flags: wikipedia_dropped_other_sources_exist | tier=bronze indep_score=0.525 clusters=5 claim_tier=notable | framework convergence=partial (upstreams: Yuri Gagarin Cosmonaut Training Center (GCTC) official archives, Russian Presidential Library (prlib.ru) historical records) — publishers independent, evidence may not be | kind=empirical eligibility=high]