highlight audited YOLO label relationships

docs/CODEX_EXECUTION_LOG.md

@@ -12565,3 +12565,33 @@ Open:
   on a dedicated 384 px contact sheet. Visual follow-up found complex/adjacent
   building components rather than a systematic duplicate-label pattern.
 - Targeted auditor and renderer tests passed: 9 tests.
+
+## 2026-08-09 - Index-bound relationship highlighting
+
+### Improved
+
+- Connected the relationship-audit manifest to the visual label renderer so
+  exact duplicates, near duplicates and possible nesting receive distinct
+  colors and every implicated YOLO row is labelled with its source index.
+- Generated a new immutable 36-tile focused sheet on Tower. It renders 17,253
+  valid labels, highlights all 86 rows participating in the 43 nesting pairs
+  and contains zero invalid label rows.
+- AI-assisted inspection confirmed that the focused corpus contains only
+  magenta nesting candidates; no exact or high-IoU duplicate category is
+  present. The cases remain dispersed dense-GRB review candidates rather than
+  a safe deterministic rewrite set.
+- Retained every source file and label unchanged. Excluding entire flagged
+  tiles would remove 17,167 unflagged labels and is therefore not justified.
+
+### Verified
+
+- Targeted relationship-auditor, renderer and Sprint 167 regression suite:
+  10 tests passed.
+- Scoped Ruff check, Ruff format check, Python compilation and Git whitespace
+  check passed.
+
+### Remaining limitation
+
+- This is explicit AI-assisted triage, not human adjudication. It improves the
+  evidence and review precision but does not unlock governed production
+  training or checkpoint promotion.