Apply codex round-7 Phase 5 copy-edit fixes + refresh STATE.md

Mechanical copy-edit closing the OPEN/PARTIAL items from
paper/codex_review_gpt55_v4_round7.md; substantive empirical
content unchanged. Manuscript-splice items (strip internal draft
notes, update stale abstract-count note) deferred to final splice.

- Phase 4 prose §V-G + §III-K methodology: "candidate classifiers"
  -> "candidate checks" (closes round-7 m13 + Spot-check 3 wording leak)
- Phase 4 prose §II: remove placeholder caveat sentence at the LOOO
  paragraph (closes round-7 M6 + A4)
- References v3: add [42] Stone 1974, [43] Geisser 1975, [44] Vehtari
  et al. 2017 (44 entries; was 41) — backs the §II LOOO addition
- Round-7 review: add row-count clarification note (11 Major / 15
  Minor labelled rows vs. the prompt's 9/12 tally)
- STATE.md: refresh from stale Phase-2 snapshot to current Phase 5
  status — Phases 1-4 complete; codex rounds 1-7 closed at Minor
  Revision; pending Gemini + Opus rounds + round-2/3 convergence

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

paper/codex_review_gpt55_v4_round7.md

@@ -16,6 +16,8 @@ The remaining issues are packaging / copy-edit blockers, not empirical blockers:
 
 ## Round-26 finding closure table
 
+Note: the round-26 file contains 11 labelled Major rows and 15 labelled Minor rows; this table covers every labelled row. The prompt's 9 Major / 12 Minor tally appears to merge duplicate themes.
+
 ### Major findings
 
 | # | Round-26 finding | v2 status | Round-27 note |