Добавлена оперативная и историческая статистика нод и узлов mnesia #22

src/handlers/ws_handler.erl

@@ -55,6 +55,7 @@ init(Req, _Opts) ->
 websocket_init(#state{user_id = UserId} = State) ->
   pg:join(eventhub_ws, self()),
   io:format("[WS] User ~s connected~n", [UserId]),
+  core_counters:inc(ws_connections),
   {ok, State#state{subscriptions = []}}.
 
 -spec websocket_handle(term(), #state{}) ->
@@ -99,6 +100,7 @@ websocket_info(_Info, State) ->
 -spec terminate(term(), cowboy_req:req(), #state{}) -> ok.
 terminate(_Reason, _Req, #state{user_id = UserId}) ->
   pg:leave(eventhub_ws, self()),
+  core_counters:dec(ws_connections),
   io:format("[WS] User ~s disconnected~n", [UserId]),
   ok.