Bug Description

Environment:

• MemOS version: v2 (latest)
• Deployment: hermes-agent plugin mode
• Node.js process running normally

Problem:
Web UI shows Memory count: 500 but database has 1400+ traces. The number stays fixed at 500 regardless of actual trace count growth.

Expected behavior:
Memory count should reflect actual trace count in database (~1422), not a fixed cap of 500.

Steps to reproduce:

1. Use hermes-agent with MemOS normally
2. Observe Web UI number after extended use
3. Number stops at 500 while database trace_count exceeds 1400

Initial analysis:
Suspect issue in metrics().total calculation logic, or frontend applying a hard cap on totalCount. Database query for trace count is accurate - problem is in presentation layer.

Impact:
Cannot accurately monitor memory system storage via Web UI.