chore(git): add node_modules to .gitignore

Ignore node_modules/ directory from @anthropic-ai/claude-code
dependency. Minimal Node.js usage (AI agent integration only).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: AI Assistant

.gitignore

@@ -28,3 +28,6 @@ htmlcov/
 
 # Local overrides
 *.local
+
+# Node.js (minimal usage for Claude Code dependency)
+node_modules/