Address PR #415 R4 review (1 P3 directional wording)

R4 P3 — The new claim-vs-shipped audit (in the Single-Pass Completeness
Mandate at lines 100-125) said "per the Deferred Work Acceptance section
above", but that section is at lines 95-110 — BELOW the Mandate, not
above. Trivial directional fix: above -> below in both pr_review.md and
the matching substitution old-half in openai_review.py.

R4 verdict was already ✅ (P3 doesn't block under the new rules); this
commit is cosmetic cleanup so the remaining nit is gone.

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

Author: igerber

.claude/scripts/openai_review.py

@@ -996,7 +996,7 @@ def estimate_cost(
      claim of correctness) or **P1** (missing assumption check).
    - **Tests**: a behavioral regression test exists for the claimed behavior.
      Missing test for shipped behavior is **P2** per the deferral rule
-     (per the Deferred Work Acceptance section above) — TODO.md tracking does
+     (per the Deferred Work Acceptance section below) — TODO.md tracking does
      NOT downgrade this.
    - **Public docstrings**: affected method/class docstrings mention the new
      behavior (parameters, return-shape additions, side effects). Missing is

.github/codex/prompts/pr_review.md

@@ -103,7 +103,7 @@ Before finalizing, confirm you have run each of these audits on the diff:
      claim of correctness) or **P1** (missing assumption check).
    - **Tests**: a behavioral regression test exists for the claimed behavior.
      Missing test for shipped behavior is **P2** per the deferral rule
-     (per the Deferred Work Acceptance section above) — TODO.md tracking does
+     (per the Deferred Work Acceptance section below) — TODO.md tracking does
      NOT downgrade this.
    - **Public docstrings**: affected method/class docstrings mention the new
      behavior (parameters, return-shape additions, side effects). Missing is