added cam double trigger and pragma once in GS

STM32/CM7/Core/Inc/global_state.h

@@ -1,7 +1,7 @@
 // Copyright (C) 2026 Pierre Barbier <pierrebarbier741@gmail.com>
 // Copyright (C) 2026 Association Exergie <association.exergie@gmail.com>
 // SPDX-License-Identifier: GPL-3.0-or-later
-
+#pragma once
 #include <ring_buffer.h>
 #include <stdint.h>