Recognize BitComet padding file names

src/archive_clients/bencode.py

@@ -168,7 +168,7 @@ def _v1_files(info: dict[bytes, Any]) -> list[MetaFile]:
         components = [name] + [_component(part) for part in raw_path]
         result.append(MetaFile(
             "/".join(components), _length(item.get(b"length")),
-            _padding(item),
+            _padding(item) or _bitcomet_padding_name(components[-1]),
         ))
     return result
 
@@ -223,3 +223,13 @@ def _length(value: Any) -> int:
 def _padding(value: dict[bytes, Any]) -> bool:
     attributes = value.get(b"attr", b"")
     return isinstance(attributes, bytes) and b"p" in attributes
+
+
+def _bitcomet_padding_name(component: str) -> bool:
+    """Recognize BitComet's legacy padding-file convention.
+
+    Such v1 torrents often omit the standard ``attr=p`` flag, but
+    qBittorrent/libtorrent still hides these synthetic entries from its file
+    API.  The exact reserved prefix is the interoperable marker.
+    """
+    return component.startswith("_____padding_file_")