Refactor code structure for improved readability and maintainability

tests/conftest.py

@@ -358,15 +358,13 @@ def test_user_id(test_user: User):
 @pytest.fixture
 def test_sound_id():
     """Create a test sound ID."""
-    import uuid
-    return uuid.uuid4()
+    return 1
 
 
 @pytest.fixture
 def test_playlist_id():
     """Create a test playlist ID."""
-    import uuid
-    return uuid.uuid4()
+    return 1
 
 
 @pytest.fixture