Add engagement margin reporting

tests/test_models.py

@@ -1,6 +1,14 @@
 """Smoke tests for fin-hub model registration."""
 
-from fin_hub.models import Budget, BurnRate, Commitment, RunwayProjection, ServiceCost, TokenSpend
+from fin_hub.models import (
+    Budget,
+    BurnRate,
+    Commitment,
+    EngagementPrice,
+    RunwayProjection,
+    ServiceCost,
+    TokenSpend,
+)
 from hub_core.models.base import Base
 
 
@@ -12,6 +20,7 @@ def test_fin_models_register_on_metadata():
     assert "fin_runway_projections" in tables
     assert "fin_token_spends" in tables
     assert "fin_service_costs" in tables
+    assert "fin_engagement_prices" in tables
 
 
 def test_model_classes_importable():
@@ -21,6 +30,7 @@ def test_model_classes_importable():
     assert RunwayProjection.__tablename__ == "fin_runway_projections"
     assert TokenSpend.__tablename__ == "fin_token_spends"
     assert ServiceCost.__tablename__ == "fin_service_costs"
+    assert EngagementPrice.__tablename__ == "fin_engagement_prices"
 
 
 def test_service_cost_has_external_attribution_seam():