fix: add pyarrow to test deps and restore direct imports

Add pyarrow>=16.1.0 to the test dependency group so arrow tests
run in CI rather than being skipped. Restore direct pyarrow imports
in the test file (importorskip workaround no longer needed).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Martozar

packages/gooddata-pandas/pyproject.toml

@@ -65,6 +65,7 @@ test = [
     "python-dotenv~=1.0.0",
     "pyyaml",
     "tests_support",
+    "pyarrow>=16.1.0",
 ]
 
 [tool.ty.analysis]

packages/gooddata-pandas/tests/dataframe/test_dataframe_for_exec_def_arrow.py

@@ -7,13 +7,11 @@
 
 import numpy
 import pandas
+import pyarrow as pa
 import pytest
-
-pa = pytest.importorskip("pyarrow", reason="pyarrow is required for Arrow tests")
-ipc = pytest.importorskip("pyarrow.ipc", reason="pyarrow is required for Arrow tests")
-
-from gooddata_pandas._arrow_types import TypesMapper  # noqa: E402
-from gooddata_pandas.arrow_convertor import compute_row_totals_indexes, convert_arrow_table_to_dataframe  # noqa: E402
+from gooddata_pandas._arrow_types import TypesMapper
+from gooddata_pandas.arrow_convertor import compute_row_totals_indexes, convert_arrow_table_to_dataframe
+from pyarrow import ipc
 
 _ARROW_FIXTURES = Path(__file__).parent / "fixtures" / "arrow"