Add state validation in sandbox update operation

Author: jakubno

packages/api/internal/sandbox/store/memory/operations.go

@@ -110,6 +110,10 @@ func (s *Store) Update(sandboxID string, updateFunc func(sandbox.Sandbox) (sandb
 
 	item.mu.Lock()
 	defer item.mu.Unlock()
+	if item._data.State != sandbox.StateRunning {
+		return sandbox.Sandbox{}, &sandbox.NotFoundError{SandboxID: sandboxID}
+	}
+
 	sbx, err := updateFunc(item._data)
 	if err != nil {
 		return sandbox.Sandbox{}, err