chore(types): tighten E40 review collections

src/k1link/compute/e40_operator_review.py

@@ -8,7 +8,7 @@ from collections.abc import Iterator
 from contextlib import contextmanager
 from dataclasses import dataclass
 from pathlib import Path
-from typing import Final, Literal
+from typing import Final, Literal, cast
 
 from k1link.artifacts import utc_now_iso, write_json_atomic
 
@@ -229,7 +229,9 @@ class E40OperatorReviewStore:
                 substrate=substrate,
                 reviewer_id=reviewer_id,
             )
-            decisions = list(current["decisions"])  # type: ignore[arg-type]
+            decisions = list(
+                cast(list[dict[str, object]], current["decisions"])
+            )
             replay = next(
                 (
                     decision