yield 3-tuples for Message.Directory

adapt tuples to the same length and semantics as other messages

gallery_dl/extractor/fansly.py

@@ -37,7 +37,7 @@ class FanslyExtractor(Extractor):
             post["count"] = len(files)
             post["date"] = self.parse_timestamp(post["createdAt"])
 
-            yield Message.Directory, post
+            yield Message.Directory, "", post
             for post["num"], file in enumerate(files, 1):
                 post.update(file)
                 url = file["url"]