fix: image size reporting (#6333)

.github/actions/docker-remote-build/action.yml

@@ -176,6 +176,8 @@ runs:
     - name: Capture Build Metrics
       id: metrics
       shell: bash
+      env:
+        AWS_DEFAULT_REGION: ${{ inputs.aws_default_region }}
       run: |
 
         # Create metrics directory
@@ -195,11 +197,34 @@ runs:
         echo "  End: ${BUILD_END_TIME}"
         echo "  Duration: ${BUILD_DURATION_SEC} seconds"
 
-        # Get image size using docker inspect
+        # Get image size
         IMAGE_TAG="${{ steps.build.outputs.image_tag }}"
+        IMAGE_SIZE_TYPE="unknown"
         if [ -n "$IMAGE_TAG" ]; then
-          IMAGE_SIZE_BYTES=$(docker image inspect "$IMAGE_TAG" --format='{{.Size}}' 2>/dev/null || echo "0")
-          echo "📦 Image size: ${IMAGE_SIZE_BYTES} bytes"
+          if [ "${{ inputs.no_load }}" == "false" ]; then
+            # Image was loaded into local Docker daemon but not pushed; docker inspect
+            # reports uncompressed (virtual) size, which differs from the compressed
+            # registry size reported below
+            IMAGE_SIZE_BYTES=$(docker image inspect "$IMAGE_TAG" --format='{{.Size}}' 2>/dev/null || echo "0")
+            IMAGE_SIZE_TYPE="uncompressed"
+          elif [ "${{ inputs.push_image }}" == "true" ]; then
+            # Image was pushed to ECR without loading locally; query ECR for compressed size
+            REPO_NAME=$(echo "$IMAGE_TAG" | sed 's|.*amazonaws.com/||' | cut -d: -f1)
+            IMAGE_TAG_NAME=$(echo "$IMAGE_TAG" | cut -d: -f2-)
+            IMAGE_SIZE_BYTES=$(aws ecr describe-images \
+              --repository-name "$REPO_NAME" \
+              --image-ids "imageTag=${IMAGE_TAG_NAME}" \
+              --query 'imageDetails[0].imageSizeInBytes' \
+              --output text 2>/dev/null || echo "0")
+            # Treat empty or "None" response as 0
+            if [[ "$IMAGE_SIZE_BYTES" == "None" || -z "$IMAGE_SIZE_BYTES" ]]; then
+              IMAGE_SIZE_BYTES=0
+            fi
+            IMAGE_SIZE_TYPE="compressed"
+          else
+            IMAGE_SIZE_BYTES=0
+          fi
+          echo "📦 Image size: ${IMAGE_SIZE_BYTES} bytes (${IMAGE_SIZE_TYPE})"
         else
           IMAGE_SIZE_BYTES=0
           echo "⚠️  No image tag available"
@@ -223,6 +248,7 @@ runs:
           "platform": "${{ inputs.platform }}",
           "platform_arch": "${PLATFORM_ARCH}",
           "image_size_bytes": ${IMAGE_SIZE_BYTES},
+          "image_size_type": "${IMAGE_SIZE_TYPE}",
           "build_start_time": "${BUILD_START_TIME}",
           "build_end_time": "${BUILD_END_TIME}",
           "build_duration_sec": ${BUILD_DURATION_SEC}