Revert "Swap to dapper and system.text.json for database backend"

This reverts commit d2065bfa1b.

src/NzbDrone.Common/Extensions/IEnumerableExtensions.cs

@@ -133,6 +133,10 @@ namespace NzbDrone.Common.Extensions
                     yield return buffer.Dequeue();
             }
         }
+        public static bool In<T>(this T source, List<T> list)
+        {
+            return list.Contains(source);
+        }
 
         public static string ConcatToString<TSource>(this IEnumerable<TSource> source, string separator = ", ")
         {