fix: pin base image digests for stable/2024.1

Signed-off-by: Claude <noreply@anthropic.com>

Author: mnaser

Dockerfile

@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 # Atmosphere-Rebuild-Time: 2024-06-26T17:38:39Z
 
-FROM ghcr.io/vexxhost/openstack-venv-builder:2024.1 AS build
+FROM ghcr.io/vexxhost/openstack-venv-builder:2024.1@sha256:2ce87bba771dad3751bdf73352ae93d1f9eda1962bc8294e15229a56c499af91 AS build
 RUN <<EOF bash -xe
 uv pip install \
     --constraint /upper-constraints.txt \
@@ -20,7 +20,7 @@ uv pip install \
         python-swiftclient
 EOF
 
-FROM ghcr.io/vexxhost/python-base:2024.1
+FROM ghcr.io/vexxhost/python-base:2024.1@sha256:5f8be87b331508e33d7f048503184932d5099a583aba93dbe411df785c2055bf
 COPY --from=build --link /var/lib/openstack /var/lib/openstack
 
 # NOTE(mnaser): The Magnum client relies on the SHELL environment variable