Add trap for cleanup in e2e.sh script

- Added cleanup function to kill background processes
- Trap on EXIT ensures cleanup happens on normal exit, errors, or Ctrl+C
- Prevents orphaned backend/worker processes if script is interrupted

scripts/e2e.sh

@@ -3,6 +3,15 @@ set -e
 
 cd "$(dirname "$0")/.."
 
+# Cleanup function to kill background processes
+cleanup() {
+    kill $BACKEND_PID 2>/dev/null || true
+    kill $WORKER_PID 2>/dev/null || true
+}
+
+# Ensure cleanup runs on exit (normal, error, or interrupt)
+trap cleanup EXIT
+
 # Load environment variables if .env exists
 if [ -f .env ]; then
     set -a
@@ -49,9 +58,6 @@ else
 fi
 EXIT_CODE=$?
 
-# Cleanup
-kill $BACKEND_PID 2>/dev/null || true
-kill $WORKER_PID 2>/dev/null || true
-
+# Cleanup is handled by trap EXIT
 exit $EXIT_CODE