fix: fix guard for iterating import folder files

- Fixed the guard for iterating import folder files to once again check if the current path is a media folder, but this time also check if it's the physical VFS root attached to the library. With this check in place then it will prevent other locations from triggering a full refresh of the VFS, e.g. old VFS roots and/or other media folders attached to the library that are not part of the VFS.

Shokofin/Resolvers/VirtualFileSystemService.cs

@@ -243,7 +243,7 @@ private void OnLibraryManagerItemRemoved(object? sender, ItemChangeEventArgs e)
                 }
             }
             // Iterate files in the "real" media folder.
-            else {
+            else if (mediaConfigs.Any(config => path.StartsWith(config.MediaFolderPath)) || path == vfsPath) {
                 var allPaths = GetPathsForMediaFolder(mediaConfigs);
                 pathToClean = vfsPath;
                 allFiles = GetFilesForImportFolder(mediaConfigs, allPaths);