Fix Memory Module Integration in Rust

[Al629176]

Goal

Implement and integrate the memory module into the OpenHuman Rust codebase.

Description

Complete memory system in Rust:

• Integrate local memory system
• Ensure ingestion + recall works
• Expose memory insights in UI

Acceptance Criteria

• Memory module works end-to-end
• Recall returns correct data
• Integrated into Rust backend
• Memory visible in intelligence page
• Unit tests + docs included