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__

tests/test_smoke.py

@@ -0,0 +1,59 @@
+"""Smoke tests for mlflow_utils package."""
+
+from __future__ import annotations
+
+import pytest
+
+
+def test_package_imports() -> None:
+    """All public symbols are importable."""
+    from mlflow_utils import (  # noqa: F401
+        MLflowConfig,
+        MLflowTracker,
+        InferenceMetricsTracker,
+        get_mlflow_client,
+        get_tracking_uri,
+        ensure_experiment,
+    )
+
+
+def test_version() -> None:
+    import mlflow_utils
+
+    assert mlflow_utils.__version__
+
+
+def test_mlflow_config_defaults() -> None:
+    from mlflow_utils.client import MLflowConfig
+
+    cfg = MLflowConfig()
+    assert "mlflow" in cfg.tracking_uri
+    assert cfg.tracking_uri.startswith("http")
+
+
+def test_cli_entrypoint() -> None:
+    """CLI main function exists and is callable."""
+    from mlflow_utils.cli import main
+
+    assert callable(main)
+
+
+def test_kfp_components_importable() -> None:
+    kfp = pytest.importorskip("kfp")  # noqa: F841
+    from mlflow_utils.kfp_components import (  # noqa: F401
+        create_mlflow_run,
+        log_metrics_component,
+    )
+
+
+def test_model_registry_importable() -> None:
+    from mlflow_utils.model_registry import (  # noqa: F401
+        register_model_for_kserve,
+        generate_kserve_manifest,
+    )
+
+
+def test_experiment_comparison_importable() -> None:
+    from mlflow_utils.experiment_comparison import (  # noqa: F401
+        ExperimentAnalyzer,
+    )