chore: clean up scheduling review diagnostics

tests/scheduling/test_schedule_store.py

@@ -140,10 +140,9 @@ def test_candidate_is_at_most_one(tmp_path: Path) -> None:
     )
     store.save_candidate(first, schedule_id="a")
     store.save_candidate(second, schedule_id="a")
-    assert store.get_candidate("a") is not None
-    assert store.get_candidate("a").intended_at == datetime(  # type: ignore[union-attr]
-        2026, 9, 8, 13, 0, tzinfo=UTC
-    )
+    candidate = store.get_candidate("a")
+    assert candidate is not None
+    assert candidate.intended_at == datetime(2026, 9, 8, 13, 0, tzinfo=UTC)
 
 
 def test_history_pagination_over_resolved_utc(tmp_path: Path) -> None:
@@ -163,12 +162,13 @@ def test_history_pagination_over_resolved_utc(tmp_path: Path) -> None:
         )
     page = store.list_occurrences("a", limit=2)
     assert page["total"] == 3
-    assert page["next_cursor"] is not None
-    assert "|" in str(page["next_cursor"])
+    next_cursor = page["next_cursor"]
+    assert isinstance(next_cursor, str)
+    assert "|" in next_cursor
     assert len(page["occurrences"]) == 2  # type: ignore[arg-type]
     second = store.list_occurrences(
         "a",
-        cursor=page["next_cursor"],
+        cursor=next_cursor,
         limit=2,  # type: ignore[arg-type]
     )
     assert second["next_cursor"] is None