Add data/evolutions/ to .gitignore

Runtime evolution state files are user data, not source code.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: SL-Mar

.gitignore

@@ -51,6 +51,7 @@ article_processor.log
 # QuantCoder specific - user data
 downloads/
 generated_code/
+data/evolutions/
 articles.json
 output.html
 output.*