init: tianyan-edge edge agent with Ascend NPU inference backend

- Go main process: stream ingestor, infer client, event uploader,
  heartbeat, config agent, OTA agent
- Python inference server rewritten to use CANN ACL (acl module)
  replacing ultralytics/PyTorch; supports YOLOv8 raw and YOLOv10
  NMS-free output formats via OUTPUT_FORMAT env var
- systemd services for edge-agent and edge-infer
- build/install/package scripts targeting arm64

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

config/edge.yaml.template

@@ -0,0 +1,18 @@
+edge_id: edge-demo-001
+cloud_url: http://localhost:8004
+edge_token: ""
+
+# 5 路示例
+rtsp_urls:
+  - rtsp://user:pass@camera1/stream1
+  - rtsp://user:pass@camera2/stream1
+  - rtsp://user:pass@camera3/stream1
+  - rtsp://user:pass@camera4/stream1
+  - rtsp://user:pass@camera5/stream1
+
+infer_socket: /tmp/edge-infer.sock
+infer_fps: 5
+infer_workers: 3
+conf_threshold: 0.5
+dedup_window_sec: 30
+version: 1.0.0