pyproject.toml(chore[lint,types]): Exclude frozen_dataclass_sealable tests from strict checking

why:
The frozen_dataclass_sealable decorator adds attributes and methods dynamically
at runtime which causes false positive errors with static analysis tools.
Testing this functionality requires patterns that deliberately violate some
rules.

what:
- Added mypy override to ignore type errors in
  tests._internal.test_frozen_dataclass_sealable
- Added mypy override to ignore type errors in
  tests.examples._internal.frozen_dataclass_sealable.test_basic
- Added per-file ignore for RUF009 (function call in default argument) in
  test_frozen_dataclass_sealable.py
- Preserves strict typing and linting for implementation code while allowing
  tests to use dynamic features

refs: This maintains code quality while acknowledging the inherent
limitations of static analysis tools when dealing with Python's dynamic runtime
features

Author: tony

pyproject.toml

@@ -232,6 +232,7 @@ convention = "numpy"
 "src/libtmux/_internal/frozen_dataclass.py" = [
   "B010",  # set-attr-with-constant
 ]
+"tests/_internal/test_frozen_dataclass_sealable.py" = ["RUF009"]
 
 [tool.pytest.ini_options]
 addopts = [