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/api/v1/test_api_token_endpoints.py

@@ -125,7 +125,8 @@ class TestApiTokenEndpoints:
 
     @pytest.mark.asyncio
     async def test_generate_api_token_unauthenticated(
-        self, client: AsyncClient,
+        self,
+        client: AsyncClient,
     ) -> None:
         """Test API token generation without authentication."""
         response = await client.post(
@@ -197,7 +198,8 @@ class TestApiTokenEndpoints:
 
     @pytest.mark.asyncio
     async def test_get_api_token_status_unauthenticated(
-        self, client: AsyncClient,
+        self,
+        client: AsyncClient,
     ) -> None:
         """Test getting API token status without authentication."""
         response = await client.get("/api/v1/auth/api-token/status")
@@ -277,7 +279,8 @@ class TestApiTokenEndpoints:
 
     @pytest.mark.asyncio
     async def test_api_token_authentication_invalid_token(
-        self, client: AsyncClient,
+        self,
+        client: AsyncClient,
     ) -> None:
         """Test authentication with invalid API token."""
         headers = {"API-TOKEN": "invalid_token"}
@@ -312,7 +315,8 @@ class TestApiTokenEndpoints:
 
     @pytest.mark.asyncio
     async def test_api_token_authentication_empty_token(
-        self, client: AsyncClient,
+        self,
+        client: AsyncClient,
     ) -> None:
         """Test authentication with empty API-TOKEN header."""
         # Empty token