feat(memory): add agentmemory REST API client for dual-memory system

[traderlife8]

Summary

Add memory/agentmemory_client.py to support agentmemory REST API as a dual-memory layer.

Motivation

GA's local memory files cannot be directly used by other agents. Adding agentmemory support provides:

• Cross-agent memory sharing: Any agent with agentmemory can read/write shared memories
• Dual-memory redundancy: agentmemory + local files = more robust
• Standard API: REST-based, language-agnostic, easy to integrate

Changes

• Add memory/agentmemory_client.py with:

emember() / search() / get_memories() / delete() / observe()

• health() / get_sessions() utilities
• Compatible with https://github.com/rohitg00/agentmemory
• Default endpoint: http://localhost:3111

Notes

• agentmemory service must run separately (pip install agentmemory)
• Works alongside existing local memory (dual-memory pattern)
• REST API enables memory sharing across any agent framework