- Change user field type from pyarrow.string() to pyarrow.uuid() in
knowledge_memories and knowledge_scenario schemas
- Convert user to UUID via _uuid() in memories_store()
- Use UUID hex comparison in memories_filter() and memories_latest()
- Rename user to user_id in memories tool schemas with UUID description
- Convert user to UUID in memories tool handlers
- Add User ID (UUID) to User Context in telegram and xmpp clients
- Update roleplayer instructions to use user_id with UUID instead of
nickname
