fix: address pre-push review findings

orchestrator.py

@@ -413,7 +413,7 @@ def run_optimization_loop(callback=None, config_override=None):
             with open(results_local) as f:
                 results = json.load(f)
 
-            current_score = results.get("cost_basis_improvement_pct", 0)
+            current_score = objective_score(results)
             signal_count = results.get("strong_buy_signal_count", 0)
             is_best = current_score > best_score and signal_count >= MIN_SIGNAL_COUNT
 
@@ -427,6 +427,8 @@ def run_optimization_loop(callback=None, config_override=None):
                 "iteration": iteration,
                 "timestamp": datetime.now(timezone.utc).isoformat(),
                 "cost_improvement": current_score,
+                "objective_improvement": current_score,
+                "objective": "equal_periodic_contribution_terminal_wealth",
                 "signal_count": signal_count,
                 "signal_frequency": results.get("signal_frequency_pct", 0),
                 "r2_score": results.get("model_r2_score", 0),