test - add envelope import

Author: jobselko

pulp_python/app/provenance.py

@@ -11,7 +11,13 @@
 from pydantic import BaseModel, ConfigDict, Field
 from pydantic.alias_generators import to_snake
 from pypi_attestations import Attestation as _UpstreamAttestation
-from pypi_attestations import Distribution, Publisher, VerificationError, VerificationMaterial
+from pypi_attestations import (
+    Distribution,
+    Envelope,  # noqa
+    Publisher,
+    VerificationError,
+    VerificationMaterial,
+)
 from sigstore.dsse import Envelope as DSSEEnvelope
 from sigstore.dsse import _pae