cleanup: archive unused scripts, finalize docs

- Moved old GDB hook and memory monitor scripts to archive/
- Updated README with final Docker solution
- Updated .env.example, .gitignore
- Added final-note.md documenting deployment decision
- All research scripts preserved in archive/ for reference

gateway/linux/archive/mohe-wechat.service

@@ -0,0 +1,17 @@
+[Unit]
+Description=MoWeChat — 莫荷微信 Bot (Linux iLink 版)
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=hmo
+WorkingDirectory=/home/hmo/projects/AgentsMeeting/gateway/linux
+ExecStart=/home/hmo/projects/AgentsMeeting/.venv/bin/python3 /home/hmo/projects/AgentsMeeting/gateway/linux/wechat_agent.py
+Restart=on-failure
+RestartSec=5
+StandardOutput=append:/home/hmo/projects/AgentsMeeting/logs/wechat_agent_linux.log
+StandardError=append:/home/hmo/projects/AgentsMeeting/logs/wechat_agent_linux.log
+
+[Install]
+WantedBy=multi-user.target