chore: neutral .gitignore comment

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitignore

@@ -11,7 +11,7 @@ assets/warmup.jpg
 # generated traces (keep the .sample)
 traces/iris_traces.jsonl
 
-# internal dev/strategy notes (kept locally, not in the public Space)
+# local working files (not part of the deployed app)
 CLAUDE.md
 PLAN.md
 SUBMISSION.md