Small changes and cleanups (#448)

- await StartBackupSystem as it's an awaitable
- Update comment in MongoId
- Set more id's in HideoutArea to MongoId
- Remove unused logging records

Co-authored-by: Chomp <27521899+chompDev@users.noreply.github.com>

Libraries/SPTarkov.Server.Core/Callbacks/SaveCallbacks.cs

@@ -17,7 +17,7 @@ public class SaveCallbacks(
 
     public async Task OnLoad()
     {
-        _backupService.StartBackupSystem();
+        await _backupService.StartBackupSystem();
         await _saveServer.LoadAsync();
     }