fix(event): add 401 handling to prevent infinite retry loop on auth failure

- UploadError struct to distinguish fatal auth errors from network errors
- Clear buffer and throttle on 401/403 to save bandwidth
- Prevent dead-loop retry when token is invalid or expired

data/config/edge.yaml

@@ -0,0 +1,16 @@
+device_uuid: 8541db9f77826e39605ef2c032f8fb93
+edge_id: edge-demo-001
+cloud_url: http://101.36.73.102:8004
+mqtt_broker: tcp://101.36.73.102:1883
+mqtt_user: ""
+mqtt_pass: ""
+edge_token: "be079dc5ec8d7c3796d052f3c10143cd"
+rtsp_urls:
+    - "http://101.36.73.102:8080/rtp/34020000002000000003_34020000001310000001.live.flv?secret=be079dc5ec8d7c3796d052f3c10143cd"
+infer_socket: /tmp/edge-infer.sock
+infer_fps: 2
+infer_workers: 3
+conf_threshold: 0.2
+dedup_window_sec: 30
+ota_url: http://101.36.73.102:8087
+version: 1.0.0