[AutoTool | PrimitiveOffer] remove priority_bias in favor of cost_at

masque/builder/planner/planner.py

@@ -350,11 +350,16 @@ class Solver:
                 )
 
         def offer_key(offer: PrimitiveOffer) -> tuple[Any, ...]:
+            cost_key: tuple[str, float | int]
+            if callable(offer.cost):
+                cost_key = ('callable', id(offer.cost))
+            else:
+                cost_key = ('factor', round(float(offer.cost), 9))
             return (
                 type(offer).__qualname__,
                 offer.in_ptype,
                 offer.out_ptype,
-                round(float(offer.priority_bias), 9),
+                cost_key,
                 tuple(round(float(value), 9) for value in offer.parameter_domain),
                 getattr(offer, 'ccw', None),
                 id(offer.endpoint_planner),