fix: update edge-agent.service with correct paths, env vars, and logging

- Change After dependency to telegraf.service
- Add LD_LIBRARY_PATH for Ascend CANN libraries
- Fix ExecStart path (bin/ -> /opt/tianyan-edge/)
- Change Restart to on-failure with rate limiting
- Add journal logging with SyslogIdentifier

systemd/edge-agent.service

@@ -1,13 +1,23 @@
 [Unit]
 Description=Tianyan Edge Agent
-After=network-online.target edge-infer.service
+After=network-online.target telegraf.service
 Wants=network-online.target
 
 [Service]
 Type=simple
-ExecStart=/opt/tianyan-edge/bin/edge-agent -config /opt/tianyan-edge/config/edge.yaml
-Restart=always
-RestartSec=3
+WorkingDirectory=/opt/tianyan-edge
+Environment="PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
+Environment="LD_LIBRARY_PATH=/usr/local/Ascend/ascend-toolkit/latest/arm64-linux/lib64:/usr/local/Ascend/driver/lib64"
+ExecStart=/opt/tianyan-edge/edge-agent -config /opt/tianyan-edge/config/edge.yaml
+Restart=on-failure
+RestartSec=5
+StartLimitBurst=5
+StartLimitIntervalSec=60
+
+# 日志
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=edge-agent
 
 [Install]
 WantedBy=multi-user.target