microsecond timestamp is added

Author: blackav

include/ejudge/runlog_state.h

@@ -2,7 +2,7 @@
 #ifndef __RUNLOG_STATE_H__
 #define __RUNLOG_STATE_H__
 
-/* Copyright (C) 2008-2022 Alexander Chernov <[email protected]> */
+/* Copyright (C) 2008-2023 Alexander Chernov <[email protected]> */
 
 /*
  * This program is free software; you can redistribute it and/or modify
@@ -87,6 +87,9 @@ struct runlog_state
   RUNS_ACCESS int                run_a;
   teamdb_state_t     teamdb_state;
 
+  // timestamp of the last change with microsecond precision
+  long long last_update_time_us;
+
   struct user_flags_info_s user_flags; // banned/invisible/locked flags for users
 
   int max_user_id;