enhance: Add progress logging for VM installation

[williamzujkowski]

Problem

During E2E testing, we waited for VM installation to complete without clear visibility into progress. This made troubleshooting difficult.

Proposed Solutions

1. Serial Console Logging

Add a log capture option that tails the VM's serial console to a file:

virsh console --force moltdown-test > /var/log/moltdown/moltdown-test-install.log 2>&1 &

2. Standard Log Location

Create /var/log/moltdown/ or ~/.moltdown/logs/ for all moltdown operations:

• VM installation logs
• Bootstrap script logs
• Snapshot operation logs

3. Progress Indicators

• Add --verbose flag to virt_install_agent_vm.sh
• Show estimated time remaining
• Parse console output for key installation milestones

4. Health Check Script

Create a script that monitors installation progress:

./monitor_install.sh moltdown-test
# Shows: [5/8] Installing packages...
# Shows: Estimated: 3 min remaining

Related

Found during E2E testing - #9