added missing thumbnail deletion on media delete

AobaCore/Services/AobaService.cs

@@ -25,6 +25,11 @@ public class AobaService(IMongoDatabase db)
 		return await _media.Find(m => m.MediaId == id).FirstOrDefaultAsync(cancellationToken);
 	}
 
+	public async Task<List<Media>> GetMediaAsync(IEnumerable<ObjectId> ids, CancellationToken cancellationToken = default)
+	{
+		return await _media.Find(m => ids.Contains(m.MediaId)).ToListAsync(cancellationToken);
+	}
+
 	public async Task<PagedResult<Media>> FindMediaAsync(string? query, ObjectId userId, int page = 1, int pageSize = 100, CancellationToken cancellationToken = default)
 	{
 		var filters = new List<FilterDefinition<Media>>()

AobaCore/Services/ThumbnailService.cs

@@ -20,6 +20,7 @@ using SixLabors.ImageSharp.Processing;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Drawing;
 using System.Linq;
 using System.Net.Http.Headers;
 using System.Text;
@@ -53,6 +54,23 @@ public class ThumbnailService(IMongoDatabase db, AobaService aobaService)
 		return null;
 	}
 
+	public async Task<Error?> DeleteThumbnailDirectAsync(ObjectId thumbnailId)
+	{
+		try
+		{
+			await _gridfs.DeleteAsync(thumbnailId);
+		}
+		catch (GridFSFileNotFoundException)
+		{
+			//Ignore if the file was not found (somehow already deleted)
+		}
+		catch (Exception e)
+		{
+			return new ExceptionError(e);
+		}
+		return null;
+	}
+
 	/// <summary>
 	///
 	/// </summary>