fix: comprehensive Python 3.9 compatibility fixes #4

	name: CI

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

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

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

	- name: Install uv
	uses: astral-sh/setup-uv@v5
	with:
	enable-cache: true
	cache-dependency-glob: "uv.lock"

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: "3.12"

	- name: Install dependencies
	run: uv sync --all-extras --dev

	- name: Run Ruff linter
	run: uv run ruff check src/ tests/

	- name: Run Ruff formatter
	run: uv run ruff format --check src/ tests/

	- name: Run mypy
	run: uv run mypy src/

	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.9", "3.10", "3.11", "3.12"]
	steps:
	- uses: actions/checkout@v4

	- name: Install uv
	uses: astral-sh/setup-uv@v5
	with:
	enable-cache: true
	cache-dependency-glob: "uv.lock"

	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install dependencies
	run: \|
	uv python pin ${{ matrix.python-version }}
	uv sync --all-extras --dev

	- name: Run tests with coverage
	run: uv run pytest --cov-fail-under=0

	- name: Upload coverage reports
	if: matrix.python-version == '3.12'
	uses: codecov/codecov-action@v5
	with:
	file: ./coverage.xml
	fail_ci_if_error: false

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