chore(ci): aggressively prune buildkit caches inside host builder containers

.gitea/workflows/deploy.yml

@@ -51,10 +51,23 @@ jobs:
           echo "Purging old tool caches..."
           rm -rf /opt/hostedtoolcache/* || true
           rm -rf /opt/hostedtoolcache/.[!.]* || true
-          echo "Purging old build layers and dangling images..."
+          echo "=== Host Disk Usage ==="
+          docker run --rm -v /:/host-root alpine df -h || true
+          echo "=== Host Inode Usage ==="
+          docker run --rm -v /:/host-root alpine df -i || true
+          echo "=== Running Host Containers ==="
+          docker ps --format "table {{.Names}}\t{{.Status}}\t{{.Image}}" || true
+          echo "=== Host Docker Info ==="
+          docker info || true
+          echo "Pruning host Buildkit builder caches aggressively..."
+          for container in $(docker ps --filter "name=buildx_buildkit_builder" --format "{{.Names}}"); do
+            echo "Pruning Buildkit inside container: $container"
+            docker exec -i "$container" buildctl prune --all || true
+          done
+          echo "Purging old build layers, unused volumes and images..."
           docker builder prune -a -f || true
-          docker image prune -a -f || true
-          docker system prune -f || true
+          docker volume prune -f || true
+          docker system prune -a -f || true
           echo "=== System Disk Usage After Prune ==="
           df -h || true