feat: Add endpoint to retrieve currently processing extractions and corresponding tests

tests/api/v1/test_extraction_endpoints.py

@@ -184,3 +184,48 @@ class TestExtractionEndpoints:
         data = response.json()
         assert "extractions" in data
         assert isinstance(data["extractions"], list)
+
+    @pytest.mark.asyncio
+    async def test_get_processing_extractions(
+        self,
+        test_client: AsyncClient,
+        auth_cookies: dict[str, str],
+        test_session: AsyncSession,
+        authenticated_user: User,
+    ) -> None:
+        """Test getting currently processing extractions."""
+        # Create a processing extraction
+        processing_extraction = Extraction(
+            url="https://www.youtube.com/watch?v=processing",
+            user_id=authenticated_user.id,
+            service="youtube",
+            service_id="processing123",
+            title="Processing Video",
+            status="processing",
+        )
+        test_session.add(processing_extraction)
+        await test_session.commit()
+        await test_session.refresh(processing_extraction)
+
+        # Set cookies on client instance
+        test_client.cookies.update(auth_cookies)
+
+        response = await test_client.get("/api/v1/extractions/processing/current")
+
+        # Should succeed and return the processing extraction
+        assert response.status_code == 200
+        data = response.json()
+        assert isinstance(data, list)
+        assert len(data) >= 1
+
+        # Find our processing extraction in the results
+        processing_found = False
+        for extraction in data:
+            if extraction["id"] == processing_extraction.id:
+                processing_found = True
+                assert extraction["status"] == "processing"
+                assert extraction["title"] == "Processing Video"
+                assert extraction["url"] == "https://www.youtube.com/watch?v=processing"
+                break
+
+        assert processing_found, "Processing extraction not found in results"