feat: Add method to get extractions by status and implement user info retrieval in extraction service

tests/repositories/test_extraction.py

@@ -129,3 +129,36 @@ class TestExtractionRepository:
         assert result.sound_id == TEST_SOUND_ID
         extraction_repo.session.commit.assert_called_once()
         extraction_repo.session.refresh.assert_called_once_with(extraction)
+
+    @pytest.mark.asyncio
+    async def test_get_by_status(self, extraction_repo):
+        """Test getting extractions by status."""
+        mock_extractions = [
+            Extraction(
+                id=1,
+                service="youtube",
+                service_id="test123",
+                url="https://www.youtube.com/watch?v=test1",
+                user_id=1,
+                status="processing",
+            ),
+            Extraction(
+                id=2,
+                service="youtube", 
+                service_id="test456",
+                url="https://www.youtube.com/watch?v=test2",
+                user_id=1,
+                status="processing",
+            ),
+        ]
+
+        mock_result = Mock()
+        mock_result.all.return_value = mock_extractions
+
+        extraction_repo.session.exec = AsyncMock(return_value=mock_result)
+
+        result = await extraction_repo.get_by_status("processing")
+
+        assert len(result) == 2
+        assert all(extraction.status == "processing" for extraction in result)
+        extraction_repo.session.exec.assert_called_once()