Remove cached images before pull to fix digest mismatch

Docker/containerd caches manifests locally which can conflict with
the registry when images are rebuilt with the same tag. Remove the
cached images before pulling to ensure a fresh pull.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/docker_build.yml

@@ -268,7 +268,13 @@ jobs:
             # Use exact image tags passed from build jobs (no :latest fallback)
             echo "Using images: $EAGLE_IMAGE, $SHARDOK_IMAGE"
 
-            # Pull images with exact SHA tags
+            # Remove cached images to avoid digest mismatch errors
+            # Docker/containerd caches manifests locally which can conflict with registry
+            echo "Removing cached images to avoid digest conflicts..."
+            docker image rm "$EAGLE_IMAGE" 2>/dev/null || true
+            docker image rm "$SHARDOK_IMAGE" 2>/dev/null || true
+
+            # Pull fresh images with exact SHA tags
             echo "Pulling Eagle image: $EAGLE_IMAGE"
             docker pull "${EAGLE_IMAGE}" || { echo "ERROR: Failed to pull eagle image"; exit 1; }