Harden ACC installer update and endpoint performance

src/BizTalkCheckmkPulse/Models.cs

@@ -349,6 +349,8 @@ namespace BizTalkCheckmkPulse
         public int Active { get; set; }
         public int SkippedInactive { get; set; }
         public int UnsupportedActive { get; set; }
+        public int UniqueTargets { get; set; }
+        public long ProbeDurationMilliseconds { get; set; }
         public string Failure { get; set; }
         public List<EndpointProbeResult> Results { get; private set; }
     }