refactor(firmware): simplify configuration and diagnostics

firmware/platforms/stm32f7/src/f722/firmware.rs

@@ -102,6 +102,7 @@ macro_rules! __f722_flight_application {
                     <$board as $crate::F7Board>::IMMUTABLE_CONFIG,
                 )
                 .unwrap_or_else(|_| safe_idle());
+                $crate::__platform_internal::logging::info!("flight controller initialized");
                 schedule_imu(IMU_EVENT_START);
                 (
                     Shared {
@@ -250,7 +251,7 @@ macro_rules! __f722_flight_application {
             #[task(binds = TIM2, priority = 4, local = [timer], shared = [lidar])]
             fn tim2(mut context: tim2::Context) {
                 context.local.timer.acknowledge_update();
-                context.shared.lidar.lock(F722LidarState::on_timer);
+                let _ = context.shared.lidar.lock(F722LidarState::on_timer);
                 schedule_imu(IMU_EVENT_TIMER);
                 schedule_mavlink(MAVLINK_EVENT_TIMER);
             }