testing using ffmpeg to generate thumbnails for avif

AobaServer/Services/DebugService.cs

@@ -0,0 +1,19 @@
+
+using AobaCore.Services;
+
+namespace AobaServer.Services;
+
+public class DebugService(AobaService aobaService, ThumbnailService thumbnailService) : BackgroundService
+{
+	protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+	{
+		var mediaItems = await aobaService.FindMediaWithExtAsync(".avif", stoppingToken);
+		foreach (var item in mediaItems)
+		{
+			foreach (var size in item.Thumbnails.Keys)
+			{
+				await thumbnailService.DeleteThumbnailAsync(item.MediaId, size);
+			}
+		}
+	}
+}