fixed missing methods

code/Infrastructure/Verticals/DownloadCleaner/DownloadCleaner.cs

@@ -89,6 +89,9 @@ public sealed class DownloadCleaner : GenericHandler
         
         List<object>? downloadsToClean = _downloadService.FilterDownloadsToBeCleanedAsync(downloads, _config.Categories);
         
+        // release unused objects
+        downloads = null;
+        
         _logger.LogTrace("looking for downloads clean");
         await _downloadService.CleanDownloadsAsync(downloadsToClean, _config.Categories, _excludedHashes);
     }

code/Infrastructure/Verticals/DownloadClient/Deluge/DelugeService.cs

@@ -196,11 +196,19 @@ public class DelugeService : DownloadService, IDelugeService
         return result;
     }
 
-    public override async List<object>? FilterDownloadsToBeCleanedAsync(List<object>? downloads, List<CleanCategory> categories)
+    public override async Task<List<object>?> GetSeedingDownloads()
     {
         return (await _client.GetStatusForAllTorrents())
             ?.Where(x => !string.IsNullOrEmpty(x.Hash))
             .Where(x => x.State?.Equals("seeding", StringComparison.InvariantCultureIgnoreCase) is true)
+            .Cast<object>()
+            .ToList();
+    }
+
+    public override List<object>? FilterDownloadsToBeCleanedAsync(List<object>? downloads, List<CleanCategory> categories)
+    {
+        return downloads
+            ?.Cast<TorrentStatus>()
             .Where(x => categories.Any(cat => cat.Name.Equals(x.Label, StringComparison.InvariantCultureIgnoreCase)))
             .Cast<object>()
             .ToList();

code/Infrastructure/Verticals/DownloadClient/DummyDownloadService.cs

@@ -53,6 +53,11 @@ public class DummyDownloadService : DownloadService
         throw new NotImplementedException();
     }
 
+    public override Task<List<object>?> GetSeedingDownloads()
+    {
+        throw new NotImplementedException();
+    }
+
     public override List<object>? FilterDownloadsToBeCleanedAsync(List<object>? downloads, List<CleanCategory> categories)
     {
         throw new NotImplementedException();

code/Infrastructure/Verticals/DownloadClient/Transmission/TransmissionService.cs

@@ -181,9 +181,8 @@ public class TransmissionService : DownloadService, ITransmissionService
 
         return result;
     }
-
-    /// <inheritdoc/>
-    public override async List<object>? FilterDownloadsToBeCleanedAsync(List<object>? downloads, List<CleanCategory> categories)
+    
+    public override async Task<List<object>?> GetSeedingDownloads()
     {
         string[] fields = [
             TorrentFields.FILES,
@@ -199,11 +198,21 @@ public class TransmissionService : DownloadService, ITransmissionService
             TorrentFields.SECONDS_SEEDING,
             TorrentFields.UPLOAD_RATIO
         ];
-            
+
         return (await _client.TorrentGetAsync(fields))
             ?.Torrents
             ?.Where(x => !string.IsNullOrEmpty(x.HashString))
             .Where(x => x.Status is 5 or 6)
+            .Cast<object>()
+            .ToList();
+    }
+
+    /// <inheritdoc/>
+    public override List<object>? FilterDownloadsToBeCleanedAsync(List<object>? downloads, List<CleanCategory> categories)
+    {
+        return downloads
+            ?
+            .Cast<TorrentInfo>()
             .Where(x => categories
                 .Any(cat =>
                 {