Refactor test files for improved readability and consistency

- Removed unnecessary blank lines and adjusted formatting in test files.
- Ensured consistent use of commas in function calls and assertions across various test cases.
- Updated import statements for better organization and clarity.
- Enhanced mock setups in tests for better isolation and reliability.
- Improved assertions to follow a consistent style for better readability.

tests/repositories/test_sound.py

@@ -359,7 +359,7 @@ class TestSoundRepository:
         """Test creating sound with duplicate hash should fail."""
         # Store the hash to avoid lazy loading issues
         original_hash = test_sound.hash
-        
+
         duplicate_sound_data = {
             "name": "Duplicate Hash Sound",
             "filename": "duplicate.mp3",
@@ -373,4 +373,4 @@ class TestSoundRepository:
 
         # Should fail due to unique constraint on hash
         with pytest.raises(Exception):  # SQLAlchemy IntegrityError or similar
-            await sound_repository.create(duplicate_sound_data)
+            await sound_repository.create(duplicate_sound_data)