- Update primary support from Proxmox VE 8.x to 9.x
- Change privilege examples from VM.Monitor to VM.GuestAgent.Audit
(VM.Monitor removed in PVE 9.x)
- Add backward compatibility notes for 8.x users
- Update production requirements and examples
Signed-off-by: Pavel Boldyrev <627562+bpg@users.noreply.github.com>