fix(mypy): skip huggingface_hub imports to resolve Python 3.9 syntax error

huggingface_hub uses match statements (Python 3.10+). With python_version
set to 3.9 in mypy config, following imports into that package caused a
syntax error that blocked all type checking. Skip it via overrides since
we don't need to type-check third-party code.

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

Author: kocabiyik

packages/python/pyproject.toml

@@ -107,6 +107,7 @@ select = [
 
 [tool.mypy]
 python_version = "3.9"
+exclude = ["^\\.venv/"]
 warn_return_any = true
 warn_unused_configs = true
 disallow_untyped_defs = true
@@ -120,6 +121,10 @@ warn_no_return = true
 warn_unreachable = true
 strict_equality = true
 
+[[tool.mypy.overrides]]
+module = ["huggingface_hub.*"]
+follow_imports = "skip"
+
 [tool.pytest.ini_options]
 testpaths = ["tests"]
 python_files = ["test_*.py"]