fix(tests): clear platform_auth cache before each test
Fixes issue #160: workspace tests fail when MOLECULE_WORKSPACE_TOKEN
is set in the environment.
The bug: platform_auth._cached_token is populated at module import or
first get_token() call and persists for the process lifetime. Tests
that use monkeypatch.delenv("MOLECULE_WORKSPACE_TOKEN") to simulate "no
token in env" were failing because delenv removes the env var but not
the module-level cache — subsequent get_token() calls returned the
stale cached value.
Fix: add a function-scoped autouse fixture in conftest.py that calls
platform_auth.clear_cache() before every test. The import is inside the
fixture to avoid collection-time import issues when platform_auth is
not yet available.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
