Verify healthcheck in image archives before and after Podman import

.gitea/workflows/build.yml

@@ -73,9 +73,18 @@ jobs:
             -t "$FULL_IMAGE:latest" \
             -t "$FULL_IMAGE:v$VERSION" \
             -t "$FULL_IMAGE:sha-$SHORT_SHA" \
-            --load \
+            --output "type=docker,dest=$RUNNER_TEMP/tvj-epg-built.tar" \
             .
 
+      - name: Verify BuildKit export and load image
+        run: |
+          set -euo pipefail
+          python3 scripts/verify_image_healthcheck.py --archive "$RUNNER_TEMP/tvj-epg-built.tar"
+          docker load --input "$RUNNER_TEMP/tvj-epg-built.tar"
+
+      - name: Report container engine versions
+        run: docker version
+
       - name: Verify healthcheck and publish
         env:
           REGISTRY: ${{ vars.REGISTRY }}
@@ -84,7 +93,8 @@ jobs:
           set -euo pipefail
           SHORT_SHA="${GITHUB_SHA::7}"
           FULL_IMAGE="$REGISTRY/david/tvj-epg"
-          docker image inspect "$FULL_IMAGE:latest" | python3 scripts/verify_image_healthcheck.py
+          docker image save --output "$RUNNER_TEMP/tvj-epg-loaded.tar" "$FULL_IMAGE:latest"
+          python3 scripts/verify_image_healthcheck.py --archive "$RUNNER_TEMP/tvj-epg-loaded.tar"
           docker push "$FULL_IMAGE:latest"
           docker push "$FULL_IMAGE:v$VERSION"
           docker push "$FULL_IMAGE:sha-$SHORT_SHA"