docs: add copilot-instructions with Python CI standards #2

	name: CI

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]

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

	jobs:
	lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: astral-sh/setup-uv@v4
	with:
	enable-cache: true
	cache-dependency-glob: "**/pyproject.toml"
	- name: Sync environment
	run: uv sync --extra dev
	- name: Format check
	run: uv run ruff format --preview --check src tests
	- name: Lint
	run: uv run ruff check --preview src tests
	- name: Type check (strict)
	run: uv run mypy --strict src

	test:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	python-version: ["3.11", "3.12", "3.13"]
	steps:
	- uses: actions/checkout@v4
	- uses: astral-sh/setup-uv@v4
	with:
	enable-cache: true
	cache-dependency-glob: "**/pyproject.toml"
	- name: Sync environment
	run: uv sync --extra test --python ${{ matrix.python-version }}
	- name: Run tests
	run: uv run pytest -q --cov --cov-report=term-missing --cov-fail-under=80

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