CPU resource check: use class member and fix param description

Signed-off-by: Silvan Fuhrer <silvan@auterion.com>

src/modules/commander/HealthAndArmingChecks/checks/cpuResourceCheck.cpp

@@ -41,8 +41,6 @@ void CpuResourceChecks::checkAndReport(const Context &context, Report &reporter)
 		return;
 	}
 
-	static hrt_abstime high_cpu_load_start_time_us_ = 0;
-
 	cpuload_s cpuload;
 
 	if (!_cpuload_sub.copy(&cpuload) || hrt_elapsed_time(&cpuload.timestamp) > 2_s) {

src/modules/commander/HealthAndArmingChecks/checks/cpuResourceCheck.hpp

@@ -49,6 +49,8 @@ public:
 private:
 	uORB::Subscription _cpuload_sub{ORB_ID(cpuload)};
 
+	hrt_abstime high_cpu_load_start_time_us_{0};
+
 	DEFINE_PARAMETERS_CUSTOM_PARENT(HealthAndArmingCheckBase,
 					(ParamFloat<px4::params::COM_CPU_MAX>) _param_com_cpu_max
 				       )

src/modules/commander/commander_params.c

@@ -920,6 +920,7 @@ PARAM_DEFINE_FLOAT(COM_KILL_DISARM, 5.0f);
 
 /**
  * Maximum allowed CPU load to still arm.
+ *
  * The check fails if the CPU load is above this threshold for 2s.
  *
  * A negative value disables the check.