feat: add CD pipeline with deploy to test target

- Add src/hello.py and tests/test_hello.py
- Replace deploy placeholder with actual rsync + health check
- Deploy target: ~/.sanguo_projects/moziplus-v2-cd-test/
- Add deploy history recording
- Add failure notification via Issue creation

tests/test_hello.py

@@ -0,0 +1,10 @@
+"""Tests for hello module."""
+from src.hello import greet, health
+
+
+def test_greet():
+    assert greet("World") == "Hello, World!"
+
+def test_health():
+    result = health()
+    assert result["status"] == "ok"