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>

Makefile

@@ -0,0 +1,16 @@
+PYTHON=python3
+
+build:
+	bash scripts/build.sh
+
+install:
+	bash scripts/install.sh
+
+package:
+	bash scripts/package-usb.sh
+
+uninstall:
+	bash scripts/uninstall.sh
+
+chmod:
+	chmod +x scripts/*.sh