Create a working SQLAlchemy demonstration in /workspace that shows how to dynamically add a relationship to…

Create a working SQLAlchemy demonstration in /workspace that shows how to dynamically add a relationship to…: a task in Repo2RLEnv TerminalWorld (EuniAI) (Harbor dataset). The script at /workspace/demo add relationship.py must run successfully with python demo add relationship.py from /workspace …

The task

The script at `/workspace/demo_add_relationship.py` must run successfully with `python demo_add_relationship.py` from `/workspace`, producing output that includes the three key lines: the "As expected" message, the `info.user` value, and the `user2.infos` list. Ensure SQLAlchemy is installed.

Part of FineEnvs/repo2rlenv-terminalworld.