fix(ci): mount /lib/modules into NFS container for automatic kernel module loading

The NFS server image already has modprobe logic built in but needs
access to host kernel modules. Avoids requiring manual modprobe on
the runner host.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/infrastructure/docker-compose.storage.yml

@@ -53,6 +53,7 @@ services:
     privileged: true
     volumes:
       - nfs-data:/srv/nfs/shared
+      - /lib/modules:/lib/modules:ro
     environment:
       NFS_EXPORT_0: /srv/nfs/shared *(rw,sync,no_subtree_check,no_root_squash)
     restart: unless-stopped