Refactor sound and extraction services to include user and timestamp fields

- Updated ExtractionInfo to include user_id, created_at, and updated_at fields.
- Modified ExtractionService to return user and timestamp information in extraction responses.
- Enhanced sound serialization in PlayerState to include extraction URL if available.
- Adjusted PlaylistRepository to load sound extractions when retrieving playlist sounds.
- Added tests for new fields in extraction and sound endpoints, ensuring proper response structure.
- Created new test file endpoints for sound downloads and thumbnail retrievals, including success and error cases.
- Refactored various test cases for consistency and clarity, ensuring proper mocking and assertions.

tests/services/test_credit.py

@@ -49,7 +49,8 @@ class TestCreditService:
             mock_repo.get_by_id.return_value = sample_user
 
             result = await credit_service.check_credits(
-                1, CreditActionType.VLC_PLAY_SOUND,
+                1,
+                CreditActionType.VLC_PLAY_SOUND,
             )
 
             assert result is True
@@ -75,7 +76,8 @@ class TestCreditService:
             mock_repo.get_by_id.return_value = poor_user
 
             result = await credit_service.check_credits(
-                1, CreditActionType.VLC_PLAY_SOUND,
+                1,
+                CreditActionType.VLC_PLAY_SOUND,
             )
 
             assert result is False
@@ -92,7 +94,8 @@ class TestCreditService:
             mock_repo.get_by_id.return_value = None
 
             result = await credit_service.check_credits(
-                999, CreditActionType.VLC_PLAY_SOUND,
+                999,
+                CreditActionType.VLC_PLAY_SOUND,
             )
 
             assert result is False
@@ -100,7 +103,9 @@ class TestCreditService:
 
     @pytest.mark.asyncio
     async def test_validate_and_reserve_credits_success(
-        self, credit_service, sample_user,
+        self,
+        credit_service,
+        sample_user,
     ) -> None:
         """Test successful credit validation and reservation."""
         mock_session = credit_service.db_session_factory()
@@ -122,7 +127,8 @@ class TestCreditService:
 
     @pytest.mark.asyncio
     async def test_validate_and_reserve_credits_insufficient(
-        self, credit_service,
+        self,
+        credit_service,
     ) -> None:
         """Test credit validation with insufficient credits."""
         mock_session = credit_service.db_session_factory()
@@ -152,7 +158,8 @@ class TestCreditService:
 
     @pytest.mark.asyncio
     async def test_validate_and_reserve_credits_user_not_found(
-        self, credit_service,
+        self,
+        credit_service,
     ) -> None:
         """Test credit validation when user is not found."""
         mock_session = credit_service.db_session_factory()
@@ -225,7 +232,9 @@ class TestCreditService:
 
     @pytest.mark.asyncio
     async def test_deduct_credits_failed_action_requires_success(
-        self, credit_service, sample_user,
+        self,
+        credit_service,
+        sample_user,
     ) -> None:
         """Test credit deduction when action failed but requires success."""
         mock_session = credit_service.db_session_factory()