feat: chi-square goodness-of-fit (closes last infer vignette gap) (#17) #48

	name: Pyodide compatibility

	# The package must stay PURE-PYTHON so it installs under Pyodide via micropip
	# (it powers in-browser code cells in the ModernDive book). This guards that
	# invariant: the built wheel must contain no compiled extensions.
	on:
	push:
	branches: [main]
	pull_request:
	workflow_dispatch:

	concurrency:
	group: pyodide-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	pure-python-wheel:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v7
	- name: Set up uv
	uses: astral-sh/setup-uv@v7
	with:
	python-version: "3.12"
	- name: Build wheel
	run: uv build --wheel
	- name: Assert wheel is pure-Python (Pyodide/micropip-safe)
	run: \|
	python - <<'PY'
	import glob, sys, zipfile
	whl = glob.glob("dist/*.whl")[0]
	names = zipfile.ZipFile(whl).namelist()
	compiled = [n for n in names if n.endswith((".so", ".pyd", ".dylib"))]
	tag = whl.split("-")[-1].replace(".whl", "")
	assert not compiled, f"compiled extensions found: {compiled}"
	assert "py3-none-any" in whl, f"wheel is not universal: {whl}"
	print(f"OK: {whl} is pure-Python ({sum(n.endswith('.parquet') for n in names)} datasets bundled)")
	PY

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