Adds virtio_balloon kernel module to support live memory resize
operations from the hypervisor without requiring VM reboot.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Adds systemd service that automatically grows the root filesystem on boot:
- Detects partition layout and grows partition if needed (growpart)
- Supports both ext4 (resize2fs) and btrfs filesystems
- Works with VIRTIO-SCSI disk (/dev/sda)
- Enables seamless live disk resize from the hosting platform
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
