feat: connect Shane voice sessions to memory

MEMORY_SERVER.md

@@ -1,4 +1,8 @@
-# Memory Server (Cognee MCP)
+# Legacy Memory Server (Cognee MCP)
+
+> The Voice agent now uses Shane Memory System at `http://192.168.86.2:8790/mcp`
+> with the per-user Bearer token in `config/users.json`. The Cognee service below
+> is retained temporarily for migration/reference.
 
 A persistent, centralized **AI memory** service you can attach to any agentic
 harness (OpenCode, Hermes, Claude Desktop, custom agents). It runs on the Unraid