don't transcode if DONE file in dir

src/transcode/transcoder.py

@@ -24,6 +24,9 @@ class Transcoder:
                         if album.is_dir():
                             for file in album.iterdir():
                                 if file.is_file():
+                                    if file.name == "DONE":
+                                        break
+                                    else:
                                         transcode_list.append(file)
                         else:
                             self.log.warning("TRK", f"Warning, skipping non-dir '{album}' found in artist '{artist.parts[-1]}'")