Hopefully make /api/v1/Stats efficient by storing count in database

TessesDedup/Client.cs

@@ -167,6 +167,7 @@ namespace TessesDedup
                     entry.Entries.Add(await BackupPathAsync(authkey,fs,ent,token));
                     }catch(Exception ex)
                     {
+                        _=ex;
                         if(!IgnoreErrors)
                         throw;
                     }