- Rewrite test_google_workspace_api.py: test bridge token handling
and calendar date range instead of removed get_credentials()
- Update test_google_oauth_setup.py: partial scopes now accepted
with warning instead of rejected with SystemExit
Store the pending OAuth state and code verifier between --auth-url and --auth-code so the manual headless flow can reuse Flow.fetch_token() without disabling PKCE.
