show threat rate in debug output

src/lib/sim/WaveSystem.cpp

@@ -103,6 +103,16 @@ double WaveSystem::threatLevel() const
     return m_threatLevel;
 }
 
+double WaveSystem::threatAccumulationRate() const
+{
+    if (isInQuietWindow())
+    {
+        return 0.0;
+    }
+    const double x = static_cast<double>(m_bossWaveCounter);
+    return std::max(0.0, m_config.world.waves.threatRateFormula.evaluate(x));
+}
+
 int WaveSystem::generation() const
 {
     return m_generation;