file-restore-daemon: add watchdog module

Add a watchdog that will automatically shut down the VM after 10
minutes, if no API call is received.

Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>

src/api2/types/file_restore.rs

@@ -8,5 +8,8 @@ use proxmox::api::api;
 pub struct RestoreDaemonStatus {
     /// VM uptime in seconds
     pub uptime: i64,
+    /// time left until auto-shutdown, keep in mind that this is useless when 'keep-timeout' is
+    /// not set, as then the status call will have reset the timer before returning the value
+    pub timeout: i64,
 }