fix: improve maintenance and synchronize live conversations

backend/tests/knowledge/test_optimized_pgvector.py

@@ -138,7 +138,7 @@ class TestOptimizedPgVector:
         # Mock the document's embed method
         with patch.object(Document, 'embed') as mock_embed:
             # Act
-            with patch('sqlalchemy.dialects.postgresql.insert') as mock_insert:
+            with patch('sqlalchemy.dialects.postgresql.insert'):
                 db.insert([pre_embedded_doc, unembedded_doc])
             
             # Assert