virtualization-mcp v1.4.0

What's Changed in v1.4.0

Features & Infrastructure

• FastMCP 3.4.4+ Upgrade: Fully aligned with FastMCP 3.4.4+ specifications and tool definitions.
• ResourceGuard Host Protection: Host RAM & CPU safety quota checks (default 95% threshold) preventing host freezes during VM or sandbox bringup.
• Interactive Prefab UI Cards: Exposed show_vm_card, show_hypervisor_health_card, and show_sandbox_status_card FastMCP UI components.
• Libvirt / KVM / QEMU Provider Plugin: Added native hypervisor support for Linux hosts and WSL2 environments (libvirt_management).
• Cloud-Init ISO Generator: Added non-interactive Linux VM seed ISO configuration generator (user-data and meta-data).
• Windows Sandbox MCP Tools: Direct tool triggers (win_sandbox_launch_consumer, win_sandbox_launch_devinfra, win_sandbox_status, win_sandbox_terminate).
• Singleton Auto-Cleanup & 30s Mount Stabilization: Gracefully cleans up stuck WindowsSandboxClient.exe processes and implements a 30-second folder mount retry loop for C:\Assets.
• Modular Webapp Backend: Decomposed monolithic backend into structured FastAPI routers (/api/vms, /api/snapshots, /api/system).

Documentation & Reliability

• Added comprehensive unit test suite tests/test_windows_sandbox_bringup.py (655 tests passing).
• Upgraded webapp Help interface and root README documentation with Libvirt and Windows Sandbox MCP tool guidance.