fix: resolve CI test failures

- Added ruff and mypy installation to CI workflow
- Removed deprecated license classifier from pyproject.toml
- Added pytest conftest.py for proper test discovery
- Fixed test paths in CI to match actual test file locations
- All 46 tests pass locally

.gitignore

@@ -1,22 +1,107 @@
+# Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]
 *$py.class
-*.so
+
+# Distribution / packaging
 .Python
 build/
+develop-eggs/
 dist/
-*.egg-info/
+downloads/
+eggs/
 .eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
 *.egg
-.pytest_cache/
-.coverage
+
+# PyInstaller
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
 htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
 .env
 .venv
 env/
 venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+
+# ruff
+.ruff_cache/
+
+# IDE
+.idea/
+.vscode/
 *.swp
 *.swo
 *~
-.mypy_cache/
-.ruff_cache/