Fix _shape=arrays and _shape=arrayfirst for rows containing infinity

remove_infinites() returns a plain list for sqlite3.Row rows that contain
infinity, which caused a 500 error with these two shapes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GaqG8H8ajwxizKXdbGrtve

tests/test_table_api.py

@@ -1302,6 +1302,24 @@ async def test_infinity_returned_as_invalid_json_if_requested(ds_client):
     ]
 
 
+@pytest.mark.asyncio
+@pytest.mark.parametrize(
+    "shape,expected",
+    (
+        ("arrays", {"ok": True, "rows": [[None], [None], [1.5]], "truncated": False}),
+        ("arrayfirst", [None, None, 1.5]),
+    ),
+)
+async def test_infinity_with_array_shapes(ds_client, shape, expected):
+    # Rows containing infinity are lists rather than sqlite3.Row objects
+    response = await ds_client.get(
+        "/fixtures/-/query.json?sql=select+value+from+infinity+order+by+rowid"
+        "&_shape=" + shape
+    )
+    assert response.status_code == 200
+    assert response.json() == expected
+
+
 @pytest.mark.asyncio
 async def test_custom_query_with_unicode_characters(ds_client):
     # /fixtures/𝐜𝐢𝐭𝐢𝐞𝐬.json