Was added the filds of start-time and end-time

application/src/main/java/org/thingsboard/server/service/telemetry/sub/Subscription.java

@@ -30,9 +30,11 @@ public class Subscription {
     private final SubscriptionState sub;
     private final boolean local;
     private ServerAddress server;
+    private long startTime;
+    private long endTime;
 
     public Subscription(SubscriptionState sub, boolean local) {
-        this(sub, local, null);
+        this(sub, local, null, 0L, 0L);
     }
 
     public String getWsSessionId() {