fix: update Pydantic model usage in table conversion and tests

Author: ya7010

src/tppt/pptx/shape/table.py

@@ -203,7 +203,7 @@ def dataframe2list(data: DataFrame) -> list[list[str]]:
                 return [columns] + rows
             # Convert list of Pydantic model instances to list of lists
             elif USE_PYDANTIC and isinstance(first_instance, PydanticModel):
-                columns = list(first_instance.__class__.model_fields.keys())
+                columns = list(first_instance.__class__.model_fields.keys())  # type: ignore
                 rows = []
                 for instance in data:
                     instance = cast(Any, instance)

tests/test_table.py

@@ -4,7 +4,6 @@
 from dataclasses import dataclass
 
 import pytest
-from pydantic import BaseModel
 
 import tppt
 from tppt._features import (
@@ -195,7 +194,7 @@ class Employee:
 def test_create_table_with_pydantic_model(output: pathlib.Path) -> None:
     """Test creating a table with Pydantic model."""
 
-    class Product(BaseModel):
+    class Product(PydanticModel):
         """Product model for testing."""
 
         name: str