lionz v0.19.6

Changes

• Fix lion() API to pass the correct arguments to predict_from_array_by_iterator, restore optional thresholding, and add verbosity toggles so library usage mirrors the CLI (#29)
• Bump project version to 0.19.6 and update packaging metadata (pyproject/lock)
• Ignore the local test.py smoke-test helper by default
• Consolidate release automation into a single workflow that publishes to PyPI, waits for propagation, then builds and pushes Docker images with the release tag