Add runtime data files to gitignore

- Exclude session files and runtime data from version control
- Keep repository clean for users

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

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

.gitignore

@@ -47,4 +47,6 @@ build/
 
 # Temporary files
 tmp/
-temp/
+temp/src/data/sessions/
+src/data/processed-messages.json
+src/data/session-map.json