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/Controllers/Api/LibrariesController.cs

@@ -8,10 +8,8 @@ namespace ErsatzTV.Controllers.Api;
 public class LibrariesController(IMediator mediator)
 {
     [HttpPost("/api/libraries/{id:int}/scan")]
-    public async Task<IActionResult> ResetPlayout(int id)
-    {
-        return await mediator.Send(new QueueLibraryScanByLibraryId(id))
+    public async Task<IActionResult> ResetPlayout(int id) =>
+        await mediator.Send(new QueueLibraryScanByLibraryId(id))
             ? new OkResult()
             : new NotFoundResult();
-    }
 }