Import infrastructure: LXC list returns 'detail not found' but still loads VMs

[pparage]

Description

When importing infrastructure, the POST request to the LXC list endpoint returns an error:

POST http://192.168.42.121:8000/v0/admin/proxmox/lxc/list
→ "detail not found"

Despite the error, the import still proceeds and shows all VMs on the canvas.

Expected behavior

• The LXC list endpoint should return a successful response
• If the endpoint errors, the UI should handle it gracefully (show warning, skip LXC containers)

Steps to reproduce

1. Open the deployer UI
2. Click "Import Infrastructure" from Proxmox
3. Observe the network request to /v0/admin/proxmox/lxc/list returning an error
4. VMs still appear on canvas despite the error