Fix ruff unused import in core info test

Assisted-by: GitHub Copilot (model: GPT-5, autonomous)

Co-authored-by: nicolehaugen <10600161+nicolehaugen@users.noreply.github.com>

Author: Copilot

tests/test_core_info_command.py

@@ -12,6 +12,7 @@
 # once the companion command lands. See specs/001-core-info/tasks.md T029.
 from __future__ import annotations
 
+import importlib
 import json
 import importlib
 import re