Handle errors during monitoring.

ObservatoryCore/LogMonitor.cs

@@ -343,9 +343,16 @@ namespace Observatory
             }
 
             foreach (string line in fileContent.Skip(currentLine[eventArgs.FullPath]))
+            {
+                try
                 {
                     DeserializeAndInvoke(line);
                 }
+                catch (Exception ex)
+                {
+                    ReportErrors(new List<(Exception ex, string file, string line)>() { (ex, eventArgs.Name, line) });
+                }
+            }
 
             currentLine[eventArgs.FullPath] = fileContent.Count;
         }