feat: add async core, AsyncSentinel, and async test suite #13

	name: CI

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

	jobs:
	test:
	runs-on: ubuntu-latest

	services:
	postgres:
	image: postgres:16
	env:
	POSTGRES_USER: sentinel_test
	POSTGRES_PASSWORD: sentinel_test
	POSTGRES_DB: sentinel_test
	ports:
	- 5432:5432
	options: >-
	--health-cmd pg_isready
	--health-interval 10s
	--health-timeout 5s
	--health-retries 5

	steps:
	- uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: "3.11"

	- name: Install dependencies
	run: \|
	pip install psycopg[binary] pytest pytest-asyncio
	pip install ./sentinel-py

	- name: Run tests
	env:
	PYTHONPATH: sentinel-py
	run: pytest tests/ -v --asyncio-mode=auto

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