Refactor code structure for improved readability and maintainability

tests/repositories/test_sound.py

@@ -21,7 +21,7 @@ class TestSoundRepository:
     async def sound_repository(
         self,
         test_session: AsyncSession,
-    ) -> AsyncGenerator[SoundRepository, None]:
+    ) -> AsyncGenerator[SoundRepository]:
         """Create a sound repository instance."""
         yield SoundRepository(test_session)
 
@@ -29,7 +29,7 @@ class TestSoundRepository:
     async def test_sound(
         self,
         test_session: AsyncSession,
-    ) -> AsyncGenerator[Sound, None]:
+    ) -> AsyncGenerator[Sound]:
         """Create a test sound."""
         sound_data = {
             "name": "Test Sound",
@@ -51,7 +51,7 @@ class TestSoundRepository:
     async def normalized_sound(
         self,
         test_session: AsyncSession,
-    ) -> AsyncGenerator[Sound, None]:
+    ) -> AsyncGenerator[Sound]:
         """Create a normalized test sound."""
         sound_data = {
             "name": "Normalized Sound",