Fixed more or less reading import, attempted to do listening

app/services/abc/exam/listening.py

@@ -1,7 +1,7 @@
 import queue
 from abc import ABC, abstractmethod
 from queue import Queue
-from typing import Dict, List
+from typing import Dict, List, Any
 
 from fastapi import UploadFile
 
@@ -23,3 +23,9 @@ class IListeningService(ABC):
     @abstractmethod
     async def get_dialog_from_audio(self, upload: UploadFile):
         pass
+
+    @abstractmethod
+    async def import_exam(
+            self, exercises: UploadFile, solutions: UploadFile = None
+    ) -> Dict[str, Any] | None:
+        pass