Native Edge Graph (SQLite): Row-Level Security & Tenant Isolation

Objective

Ensure the SQLite Native Edge Graph respects the same Multi-Tenant isolation rules as the ChromaDB vector store to prevent structural data leaks.

Tasks

1. Execute a database migration (ALTER TABLE) on the nodes and edges SQLite tables to introduce a user_id column.
2. Ensure structural ingestion tools (e.g., add_memory pushing Session Nodes, or mutate_frontier) stamp the acting config.auth.userId.
3. Refactor graph search primitives (query_hybrid_graph, search_nodes, get_node) to strictly append WHERE user_id = ? OR visibility = 'team' to prevent Alice's context window from pulling in Bob's private session nodes that happen to be structurally adjacent.