Always prompt for GPG key selection for transparency

Remove auto-selection when only one key exists. Users should always
be explicitly aware of which key is being used and have the option
to choose the default key (option 0) instead.

trace/gpg_wizard.py:79-95

trace/gpg_wizard.py

@@ -76,10 +76,6 @@ def run_gpg_wizard():
     # Let user select a key
     selected_key = None
 
-    if len(keys) == 1:
-        print(f"Only one key found. Using: {keys[0][1]}")
-        selected_key = keys[0][0]
-    else:
     while True:
         try:
             choice = input(f"Select a key (1-{len(keys)}, or 0 to use default key): ").strip()