add tracing for performance profiling

src/lib/sim/WaveSystem.cpp

@@ -3,6 +3,7 @@
 #include <algorithm>
 
 #include "ShipSystem.h"
+#include "tracing.h"
 
 WaveSystem::WaveSystem(const GameConfig& config, std::mt19937& rng)
     : m_config(config)
@@ -15,6 +16,7 @@ WaveSystem::WaveSystem(const GameConfig& config, std::mt19937& rng)
 void WaveSystem::tickWaveScheduler(Tick currentTick, ShipSystem& ships,
                                     int worldHeightTiles)
 {
+	TRACE();
     // 1. Advance boss countdown.
     --m_bossCountdownTicks;
 
@@ -75,6 +77,7 @@ void WaveSystem::tickWaveScheduler(Tick currentTick, ShipSystem& ships,
 
 void WaveSystem::tickThreatAccumulation()
 {
+	TRACE();
     const double x    = static_cast<double>(m_bossWaveCounter);
     const double rate = m_config.world.waves.threatRateFormula.evaluate(x);
     if (rate > 0.0)