- Modified `pytest.fixture` scope to `class` across tests to improve fixture lifecycle and reduce setup overhead.
- Introduced a new `tests_e2e/test_swarm.py` test suite for Docker Swarm stack configurations.
- Added E2E tests for Swarm mode with scenarios such as basic services and combined plugins.
- Updated HAProxy image in Swarm stack `.yml` files to `byjg/easy-haproxy:local` for local testing consistency.
- Added `swarm` marker in `pyproject.toml` for differentiating Docker Swarm-specific tests.
- Updated GitHub workflows to include a new Swarm E2E test pipeline.
