add TODO comment for PyArrow UUID filtering workaround

Author: ndrluis

pyiceberg/io/pyarrow.py

@@ -789,6 +789,10 @@ def visit_string(self, _: StringType) -> pa.DataType:
         return pa.large_string()
 
     def visit_uuid(self, _: UUIDType) -> pa.DataType:
+        # TODO: Change to uuid when PyArrow implements filtering for UUID types
+        # Using binary(16) instead of pa.uuid() because filtering is not
+        # implemented for UUID types in PyArrow
+        # (context: https://github.com/apache/iceberg-python/issues/2372)
         return pa.binary(16)
 
     def visit_unknown(self, _: UnknownType) -> pa.DataType: