ci: GitHub Actions (Ubuntu, uv, ruff, pytest) + repo lint cleanup #1

	name: CI

	on:
	push:
	branches: [master]
	pull_request:

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

	jobs:
	test:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	# The package is a pyo3/maturin extension, so CI needs a Rust toolchain
	# to build it during `uv sync`.
	- name: Install Rust toolchain
	uses: dtolnay/rust-toolchain@stable

	- name: Cache Rust build
	uses: Swatinem/rust-cache@v2

	- name: Install uv
	uses: astral-sh/setup-uv@v5
	with:
	enable-cache: true

	# Provisions Python 3.14 (per requires-python), builds the extension, and
	# installs locked deps.
	- name: Build extension + install deps
	run: uv sync --locked

	- name: Ruff lint
	run: uv run ruff check .

	- name: Ruff format
	run: uv run ruff format --check .

	- name: Tests
	run: uv run pytest -q

Provide feedback