fixup! clean up magic numbers, enable arbitrary gridding, add cache invalidatino

examples/08_custom_bend_geometry.py

@@ -19,7 +19,7 @@ def main() -> None:
     danger_map.precompute([])
 
     evaluator = CostEvaluator(engine, danger_map, bend_penalty=50.0, sbend_penalty=150.0)
-    context = AStarContext(evaluator, snap_size=1.0, bend_radii=[10.0])
+    context = AStarContext(evaluator, snap_size=1.0, bend_radii=[10.0], sbend_radii=[])
     metrics = AStarMetrics()
     pf = PathFinder(context, metrics)
 
@@ -37,10 +37,10 @@ def main() -> None:
     # (Just for demonstration - we override the collision model during search)
     # Define a custom centered 20x20 box
     custom_poly = Polygon([(-10, -10), (10, -10), (10, 10), (-10, 10)])
-    
+
     print("Routing with custom collision model...")
     # Override bend_collision_type with a literal Polygon
-    context_custom = AStarContext(evaluator, snap_size=1.0, bend_radii=[10.0], bend_collision_type=custom_poly)
+    context_custom = AStarContext(evaluator, snap_size=1.0, bend_radii=[10.0], bend_collision_type=custom_poly, sbend_radii=[])
     metrics_custom = AStarMetrics()
     results_custom = PathFinder(context_custom, metrics_custom, use_tiered_strategy=False).route_all(
         {"custom_model": netlist["custom_bend"]}, {"custom_model": 2.0}