Test: longdouble is float64 on Windows and Apple arm64, so sample_array may take it there

The parity leg on windows-x64 py3.14 failed one case (values11): the test expected None for a
np.longdouble array, which holds only on platforms where longdouble is 80-bit extended. Where it is
float64 the picker is right to take it (tolist reproduces the values).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: tae898

tests/test_native_timeseries_binary.py

@@ -403,7 +403,11 @@ def test_a_library_without_the_entry_keeps_the_text_path(temp_db, monkeypatch):
             True,
             None,
         ),  # int() truncates float timestamps on the text path
-        (np.ones(3, dtype=np.longdouble), False, None),
+        (
+            np.ones(3, dtype=np.longdouble),
+            False,
+            np.float64 if np.dtype(np.longdouble) == np.dtype(np.float64) else None,
+        ),  # longdouble is float64 on Windows (MSVC) and Apple arm64, 80-bit extended on x86-64 Linux
         (np.array([1, 2], dtype="datetime64[ns]"), True, np.int64),
         (np.array([1, 2], dtype="datetime64[ns]"), False, None),
         (