"""Shared pytest fixtures for mgf-vm-interchange.

Per TESTING.md:
  * tier 1 (unit) — pure functions over in-memory OVF / tar bytes;
    no filesystem-mutating operations outside ``tmp_path``.
  * tier 1 (fixtures) — replay against pre-recorded .ova fixtures
    under tests/fixtures/ with the @pytest.mark.fixtures marker.
"""

from __future__ import annotations
