docs(echo): add TRL backend note for ECHO #307

	name: Package CI

	on:
	pull_request:
	branches:
	- main
	- release
	push:
	branches:
	- main
	workflow_dispatch:

	permissions:
	contents: read

	jobs:
	package:
	name: Build and smoke-test package
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v6
	with:
	persist-credentials: false

	- name: Set up Python
	uses: actions/setup-python@v6
	with:
	python-version: "3.11"

	- name: Install build dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install build twine

	- name: Build package
	run: python -m build

	- name: Check package metadata
	run: python -m twine check dist/*

	- name: List package contents
	run: tar -tzf dist/*.tar.gz \| head -40

	- name: Smoke-test wheel install
	run: \|
	python -m venv .pkg-smoke-wheel
	. .pkg-smoke-wheel/bin/activate
	python -m pip install --upgrade pip
	python -m pip install dist/*.whl
	python - <<'PY'
	import importlib.metadata
	import openenv

	installed = importlib.metadata.version("openenv")
	assert openenv.__version__ == installed, (openenv.__version__, installed)
	print(f"openenv {installed}")
	PY
	openenv --help

	- name: Smoke-test source distribution install
	run: \|
	python -m venv .pkg-smoke-sdist
	. .pkg-smoke-sdist/bin/activate
	python -m pip install --upgrade pip
	python -m pip install dist/*.tar.gz
	python - <<'PY'
	import importlib.metadata
	import openenv

	installed = importlib.metadata.version("openenv")
	assert openenv.__version__ == installed, (openenv.__version__, installed)
	print(f"openenv {installed}")
	PY
	openenv --help

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