Further tidy test_constraints fixtures

Author: tsmbland

src/muse/constraints.py

@@ -987,14 +987,14 @@ class ScipyAdapter:
     @classmethod
     def factory(
         cls,
-        costs: xr.DataArray,
+        capacity_costs: xr.DataArray,
         constraints: list[Constraint],
         commodities: list[str],
         timeslice_level: str | None = None,
     ) -> ScipyAdapter:
         # Calculate costs for the linear problem
         lpcosts = lp_costs(
-            capacity_costs=costs,
+            capacity_costs=capacity_costs,
             commodities=commodities,
             timeslice_level=timeslice_level,
         )

src/muse/investments.py

@@ -297,7 +297,7 @@ def scipy_match_demand(
 
     # Run scipy optimization with highs solver
     adapter = ScipyAdapter.factory(
-        costs=costs,
+        capacity_costs=costs,
         constraints=constraints,
         commodities=commodities,
         timeslice_level=timeslice_level,