ci: add read-only runner storage diagnostics

.gitea/workflows/env-probe.yml

@@ -29,3 +29,20 @@ jobs:
           (find / -maxdepth 4 \( -name 'lake-manifest.json' -o -name '.lake' \) -not -path '/proc/*' 2>/dev/null | head -20) || true
           (docker images 2>&1 | head -20) || true
           (docker ps -a 2>&1 | head -10) || true
+      - name: Read-only storage diagnosis
+        run: |
+          set -eu
+          hostname
+          lsblk -e 7 -o NAME,PATH,SIZE,FSTYPE,MOUNTPOINTS
+          findmnt -T /var/lib/docker
+          df -hT / /var/lib/docker
+          docker info --format 'storage={{.Driver}} root={{.DockerRootDir}}'
+          docker system df
+          docker builder du 2>/dev/null || true
+          for dir in /var/lib/docker /var/lib/containerd /opt/lean-cache /var/cache /tmp /var/log; do
+            if [ -d "$dir" ]; then du -xhd1 "$dir" 2>/dev/null || true; fi
+          done
+          for tool in sfdisk growpart resize2fs xfs_growfs; do command -v "$tool" || true; done
+          if [ "$(hostname)" = "iZ6we8b3jgd6nc2qehu06lZ" ] && command -v growpart >/dev/null; then
+            growpart -N /dev/nvme0n1 3 || true
+          fi