v0.3.6

Added

• Added laplaced_user_info gauge metric with labels {user_id, username, first_name} for Grafana label joins

Fixed

• Fixed laplaced_rag_latency_seconds metric: was dead code (defined but never used), now properly records RAG retrieval time with user_id label
• Fixed Grafana user dropdown showing only active users — now uses memory_facts_count gauge (populated on startup for all users)