docs: README and paper-a point at index-v5

The README's artifact table still said index-v4 (one release behind
after the fp16 entry cut v5); paper-a's artifact paragraph said the
same. Both now say v5 - the index that resolves the full 23-model
catalog.

Author: Ronald Tse

README.md

@@ -25,7 +25,7 @@ This repo owns three things and nothing else:
 | Protocol CLI | `pip install interscript-ml-tools[sadeed]` ([PyPI](https://pypi.org/project/interscript-ml-tools/)) |
 | Raw predictions, every frontier run | Release [`frontier-predictions-v1`](https://github.com/interscript/interscript-ml/releases/tag/frontier-predictions-v1) |
 | Teachers + provenance labels | Release [`teachers-arabic-v1`](https://github.com/interscript/interscript-ml/releases/tag/teachers-arabic-v1) |
-| Student artifacts | `models.yaml` (index-v4) — sha256-verified in every runtime |
+| Student artifacts | `models.yaml` (index-v5) — sha256-verified in every runtime |
 
     interscript-sadeed-eval score --preds <file> --data Misraj/SadeedDiac-25
 

docs/paper-a.adoc

@@ -263,7 +263,7 @@ DER-CE scoring protocol as the `interscript-sadeed-eval` CLI (PyPI:
 raw predictions and the public benchmark; the full measurement ledger
 (RESULTS.md) with every verdict, interval, and provenance hash. Paper
 B carries the client-tier artifacts (distilled IMF v1 zips resolvable
-from index-v4, parity and margin reports, cross-runtime byte parity).
+from index-v5, parity and margin reports, cross-runtime byte parity).
 
 == References