test: attribute quoted prior-record field lists, state the judge reason bound in its schema, move split-overflow to marathon

Census 36629958451 reds:
- outside-plan-disabled-no-fallback: the model quoted the pre-existing record
  as a parenthesized field list with its exact timestamp; attribution now
  requires that exact timestamp and the record's own field values.
- plan-devex-peer-comparison-classification: the judge correctly returned
  missing but wrote a 1069-character reason, voiding the judgment; structured
  outputs cannot enforce maxLength, so the bound is stated on the field.
- plan-ceo-split-overflow ran 504-1188 s as one PTY flow and set the
  periodic lane's wall clock; it now runs weekly in the marathon lane.

test/helpers/touchfiles-data.ts

@@ -1276,7 +1276,7 @@ export const E2E_TIERS: Record<string, 'gate' | 'periodic' | 'marathon'> = {
   'plan-design-finding-floor': 'periodic',  // stochastic ask-first (see plan-mode-handshake note); periodic
   'plan-devex-finding-floor':  'gate',
   'plan-eng-multi-finding-batching': 'periodic',
-  'plan-ceo-split-overflow': 'periodic',
+  'plan-ceo-split-overflow': 'marathon', // Full /plan-ceo-review through split overflow (504–1188 s on 2.1.251)
 
   // Privacy gate for gstack-brain-sync — periodic (non-deterministic LLM call,
   // costs ~$0.30-$0.50 per run, not needed on every commit)