add some startup log messages (#872)

ErsatzTV.Application/Search/Commands/RebuildSearchIndexHandler.cs

@@ -33,10 +33,14 @@ public class RebuildSearchIndexHandler : IRequestHandler<RebuildSearchIndex, Uni
 
     public async Task<Unit> Handle(RebuildSearchIndex request, CancellationToken cancellationToken)
     {
+        _logger.LogInformation("Initializing search index");
+
         bool indexFolderExists = Directory.Exists(FileSystemLayout.SearchIndexFolder);
 
         await _searchIndex.Initialize(_localFileSystem, _configElementRepository);
 
+        _logger.LogInformation("Done initializing search index");
+
         if (!indexFolderExists ||
             await _configElementRepository.GetValue<int>(ConfigElementKey.SearchIndexVersion) <
             _searchIndex.Version)

ErsatzTV/Services/RunOnce/CacheCleanerService.cs

@@ -54,6 +54,7 @@ public class CacheCleanerService : IHostedService
         {
             _logger.LogInformation("Emptying transcode cache folder");
             localFileSystem.EmptyFolder(FileSystemLayout.TranscodeFolder);
+            _logger.LogInformation("Done emptying transcode cache folder");
         }
     }