block checkpoint evaluation on ancestral exposure

docs/reviews/2026-08-09-ai-assisted-checkpoint-review.md

@@ -237,3 +237,29 @@ mode, fails before PyTorch import, model loading or GPU inference when any
 evaluation AOI overlaps any supplied train split. The reproduced gate blocked
 on `postel_bos` for both checkpoints. Its immutable machine-readable record is
 `artifacts/evidence/accuracy/model-training/20260809-v70-evaluation-independence-gate.json`.
+
+## Full model-lineage correction
+
+The preceding correction still considered only the final fine-tune corpus of
+each checkpoint. Exact retained Ultralytics arguments establish a longer
+ancestry: the active checkpoint was initialized from
+`geointel-building-yolov8s-aoi1024expandedminpx4vis035e50`, which was initialized
+from the generic `yolov8s.pt`; the challenger was then initialized from the
+active checkpoint. The copied model assets and retained `best.pt` files match
+byte-for-byte at each building-model stage.
+
+The ancestral expanded corpus exposes all three evaluation AOIs: `postel_bos`
+as train, and `turnhout` plus `westerlo` as validation. Therefore none of the
+v69 AOIs is independent of the complete model family. Turnhout/Westerlo can
+still be used as familiar regression diagnostics, but their metrics are not a
+fresh candidate-ranking result and must not support accuracy, uncertainty,
+generalisation or release claims.
+
+The gate now requires every ancestral corpus summary and checks every recorded
+split, including validation and calibration. A reproduced Tower run blocked on
+all three AOIs before PyTorch import, model loading or GPU inference. Evidence:
+`artifacts/evidence/accuracy/model-training/20260809-v71-full-lineage-independence-gate.json`.
+The byte-matching parent/output chain is retained separately in
+`artifacts/evidence/accuracy/model-training/20260809-v71-model-lineage-receipt.json`.
+Fresh geographically separated AOIs with complete spatial and lineage checks
+are required for the next meaningful evaluation.