feat: add infrastructure automation scripts and master improvement plan

scripts/test_21_auth.py

@@ -0,0 +1,26 @@
+import os
+import sys
+import paramiko
+
+sys.stdout.reconfigure(encoding="utf-8")
+pkey = paramiko.Ed25519Key.from_private_key_file(os.path.expanduser('~/.ssh/id_ed25519_snarfnet'))
+
+for user in ["root", "dietpi", "snarf"]:
+    for auth_type in ["key", "pass"]:
+        client = paramiko.SSHClient()
+        client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
+        try:
+            if auth_type == "key":
+                client.connect("140.44.4.21", username=user, pkey=pkey, timeout=5)
+            else:
+                pw = "dietpi" if user == "dietpi" else "Katzir476!"
+                client.connect("140.44.4.21", username=user, password=pw, timeout=5)
+            print(f"SUCCESS: user={user}, auth={auth_type}")
+            stdin, stdout, stderr = client.exec_command("whoami; hostname")
+            print("  Output:", stdout.read().decode().strip())
+            client.close()
+            break
+        except Exception as e:
+            # print(f"Fail {user} {auth_type}: {e}")
+            pass
+