fpaste info: show pow difficulty level

fpaste

@@ -381,6 +381,19 @@ def cmd_info(args, config):
         print(f"server:  {config['server']}")
         print(f"name:    {data.get('name', 'unknown')}")
         print(f"version: {data.get('version', 'unknown')}")
+
+        # Fetch PoW info
+        challenge = get_challenge(config)
+        if challenge:
+            difficulty = challenge.get("difficulty", 0)
+            base_diff = challenge.get("base_difficulty", difficulty)
+            elevated = challenge.get("elevated", False)
+            if elevated:
+                print(f"pow:     {difficulty} bits (elevated from {base_diff})")
+            else:
+                print(f"pow:     {difficulty} bits")
+        else:
+            print("pow:     disabled")
     else:
         die("failed to connect to server")