[bojemoi] feat(orchestrator): add VulnHub VM automation endpoints

Commit `27f5ef4`

Add VULNHUB_CATALOG with 8 VMs (metasploitable2/3, dvwa, dc-1, kioptrix-1, basic-pentesting-1, lampiao, pwnlab-init)
VulnHubManager: asyncpg pool + host_debug upsert (multi-target, unlike rapid7 which replaces)
Endpoints: GET catalog, GET targets, POST deploy/{vm_id}, DELETE {vm_id} — clone XenServer template → start → poll IP → register in host_debug for bm12/uzi DEBUG_MODE scanning
Add Pydantic models: VulnHubDeployRequest/Response, VulnHubTargetsResponse
Add scripts/import_vulnhub_ova.sh: xe vm-import helper for first-time OVA → template creation on XenServer host

Co-Authored-By: Claude Sonnet 4.6 noreply@anthropic.com