- 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
- Add salutation field to knowledge_user schema (after alias, nullable)
- Update users_store() to accept and store salutation
- Add salutation to users_store and users_update tool schemas
- Add salutation to users_filter output display
- Add Salutation to User Context in telegram and xmpp clients
- Refactor create_table() to use per-table schema functions
- Add _TABLE_SCHEMAS dict mapping table names to schema factories
- Add ensure_table() for lazy table creation on first access
- Tables auto-create if missing when any CRUD operation is called
