test: verify rollback restores originals on partial deployment failure

tests/README.md

@@ -5,7 +5,7 @@
 ```sh
 python -m venv .venv-tests
 .venv-tests/bin/python -m pip install pytest fastapi httpx
-.venv-tests/bin/python -m pytest --noconftest tests/unit/test_accounts.py tests/unit/test_provisioner.py tests/unit/test_token_bootstrap.py -q
+.venv-tests/bin/python -m pytest --noconftest tests/unit/test_accounts.py tests/unit/test_provisioner.py tests/unit/test_token_bootstrap.py tests/unit/test_deploy_rollback.py -q
 agent/.venv/bin/python -m unittest discover -s tests/unit -p test_hermes_llm.py -v
 ```