feat: add pyproject.toml, smoke tests, and Gitea CI workflow

- pyproject.toml: hatchling build, ruff + pytest dev deps, CLI entrypoint
- tests/test_smoke.py: import validation for all modules
- .gitea/workflows/ci.yaml: lint, test, publish to Gitea PyPI, ntfy notifications
- .gitignore: exclude __pycache__

pyproject.toml

@@ -0,0 +1,39 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "mlflow-utils"
+version = "1.0.0"
+description = "MLflow integration utilities for LLM Workflows"
+readme = "README.md"
+license = "MIT"
+requires-python = ">=3.11"
+dependencies = [
+    "mlflow>=2.10.0",
+    "psycopg2-binary>=2.9.0",
+    "boto3>=1.34.0",
+    "aiohttp>=3.9.0",
+    "PyYAML>=6.0",
+]
+
+[project.optional-dependencies]
+dev = [
+    "ruff>=0.9.0",
+    "pytest>=8.0",
+    "pytest-asyncio>=0.24.0",
+]
+
+[project.scripts]
+mlflow-utils = "mlflow_utils.cli:main"
+
+[tool.ruff]
+target-version = "py311"
+line-length = 120
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "W"]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+asyncio_mode = "auto"