feat: configure supervisord to run from /workspace/ai

- Create logs directory with .gitkeep
- Update .gitignore to track logs dir but ignore log files
- Update supervisord.conf with paths relative to /workspace/ai
- Add supervisor control scripts to arty.yml (start/stop/status/restart)
- All paths now use ../ to reference parent /workspace directory

.gitignore

@@ -42,7 +42,8 @@ env/
 
 # Logs
 *.log
-logs/
+logs/*
+!logs/.gitkeep
 *.out
 
 # Supervisord runtime files