feat: add Debian 13 golden image Packer pipeline and cloud-init bootstrap

tests/test_ufw.py

@@ -0,0 +1,27 @@
+import unittest
+import os
+import shutil
+from engine.lib.ufw import resolve_ufw_docker_bin
+
+class TestUfwDockerResolution(unittest.TestCase):
+    def test_prefers_path_or_usr_local_bin_when_present(self):
+        bin_path = resolve_ufw_docker_bin()
+        # Should return a valid string path
+        self.assertIsInstance(bin_path, str)
+        self.assertTrue(len(bin_path) > 0)
+
+    def test_fallback_path(self):
+        # If not in PATH, should fall back to user local bin
+        original_which = shutil.which
+        original_isfile = os.path.isfile
+        try:
+            shutil.which = lambda cmd: None
+            os.path.isfile = lambda p: False if p == "/usr/local/bin/ufw-docker" else original_isfile(p)
+            expected = os.path.expanduser("~/.local/bin/ufw-docker")
+            self.assertEqual(resolve_ufw_docker_bin(), expected)
+        finally:
+            shutil.which = original_which
+            os.path.isfile = original_isfile
+
+if __name__ == "__main__":
+    unittest.main()