dependencies and code cleanup (#2117)

* fix validation in new form layout

* pin mediatr to last oss version

* update dependencies

* cleanup code in core

* cleanup code in ffmpeg

* cleanup code in infra

* cleanup code in scanner

* cleanup code in application

* cleanup main code

* cleanup test code

* solution-wide code cleanup

ErsatzTV.Core/Hdhr/Discover.cs

@@ -6,9 +6,9 @@ namespace ErsatzTV.Core.Hdhr;
 [SuppressMessage("Performance", "CA1822:Mark members as static")]
 public class Discover
 {
+    private readonly Guid _UUID;
     private readonly string _host;
     private readonly string _scheme;
-    private readonly Guid _UUID;
 
     public Discover(string scheme, string host, int tunerCount, Guid uuid)
     {