Update .github/workflows/ci.yml to add an integration step that:
- Reads ADT_SERVICE_KEY and/or COPILOT_ADT_SERVICE_KEY secret (already present in repo)
- Runs adt auth login non-interactively in CI using the env var to ensure service key auth works
- Fails CI if service key auth is broken
- Exercise both (basic + service key) auth flows in CI
Parent Epic: #70
Blocks: #cli-auth-selection
Update .github/workflows/ci.yml to add an integration step that:
Parent Epic: #70
Blocks: #cli-auth-selection