Implement comparable LTV engine and close WP-0005

projects/coulomb-pricing/tests/test_mvp_sprints.py

@@ -8,6 +8,7 @@ from observatory.api import build_dashboard_payload
 from observatory.credits import build_credit_summary, load_credit_wallets
 from observatory.economics import build_snapshot
 from observatory.load import (
+    load_ltv_scenarios,
     load_membership,
     load_monthly_ledger,
     load_payment_records,
@@ -58,10 +59,18 @@ def test_cost_allocation_includes_ai_variable_cost() -> None:
 def test_pricing_simulator_compares_candidate_models() -> None:
     snapshot = _snapshot()
     models = load_pricing_models(DATA_DIR)
-    simulations = build_pricing_simulations(snapshot, models, Decimal("0.06"))
+    simulations = build_pricing_simulations(
+        snapshot,
+        models,
+        Decimal("0.06"),
+        usage_records=load_usage_records(DATA_DIR),
+        scenario_catalog=load_ltv_scenarios(DATA_DIR),
+    )
 
     assert len(simulations["scenarios"]) == 3
     assert simulations["active_scenario_id"] == "flat-899-eur-monthly"
+    assert simulations["best_ltv_scenario_id"] is not None
+    assert simulations["reference_model_id"] is not None
 
 
 def test_credit_summary_tracks_remaining_allowance() -> None:
@@ -93,4 +102,4 @@ def test_dashboard_payload_includes_mvp_sections() -> None:
     assert "cost_allocation" in payload
     assert "pricing_simulations" in payload
     assert "credit_wallets" in payload
-    assert "recommendations" in payload
+    assert "recommendations" in payload