langchain

fcf71753 - chore(langchain): improve PostgreSQL Manager upsert SQLAlchemy API calls. (#32748)

chore(langchain): improve PostgreSQL Manager upsert SQLAlchemy API calls. (#32748) - Make explicit the `constraint` parameter name to avoid mixing it with `index_elements` [[Documentation](https://docs.sqlalchemy.org/en/20/dialects/postgresql.html#sqlalchemy.dialects.postgresql.Insert.on_conflict_do_update)] - ~Fallback on the existing `group_id` row value, to avoid setting it to `None`.~