add pyarrow requirement.

python/pyproject.toml

diff --git a/python/pyproject.toml b/python/pyproject.toml
index 86229aa..8b34924 100644
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -37,7 +37,8 @@
 ]
 dependencies = [
     "numpy>=2.0.0,<3",
-    "pandas>=2.0"
+    "pandas>=2.0",
+    "pyarrow>=16.0"
 ]
 
 [project.urls]