checkpoint: port evolutionary and population dynamics

include/fces/optimizer.hpp

@@ -74,10 +74,18 @@ private:
     float rollback_ema_ = 0.0f;
     int stagnation_counter_ = 0;
     float last_loss_velocity_ = 0.0f;
+    float last_sparsity_ = 0.0f;
 
     // RAM backup
     std::vector<torch::Tensor> ram_backup_;
 
+    // Layer stats and group mappings
+    std::vector<std::vector<float>> layer_stats_;
+    std::vector<int> param_group_mapping_;
+    std::unique_ptr<SpectralSensor> spectral_sensor_;
+    SpectralController spectral_controller_;
+    float last_spectral_rank_ = 0.0f;
+
     // Internal methods
     void gather_stats();
     void apply_parameter_updates(const torch::Tensor& actions);