fix: pin base image digests for stable/2025.1

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: 2024-06-25T22:49:25Z
 
-FROM ghcr.io/vexxhost/openstack-venv-builder:main AS build
+FROM ghcr.io/vexxhost/openstack-venv-builder:main@sha256:bff09007027c2b6b908e2e970fe5cf06a4c025848e69bad73aa4970aff4978e2 AS build
 RUN <<EOF bash -xe
 uv pip install \
     --constraint /upper-constraints.txt \
@@ -21,7 +21,7 @@ uv pip install \
         tap-as-a-service
 EOF
 
-FROM ghcr.io/vexxhost/python-base:main
+FROM ghcr.io/vexxhost/python-base:main@sha256:4ab6c0c1a31e169d3b158e8ad70963b91ea933ae63a279640ded5d37e92815b7
 COPY --from=build --link /var/lib/openstack /var/lib/openstack
 
 # NOTE(mnaser): The Magnum client relies on the SHELL environment variable