integrate ganjihong engine refactor

backend/engine/cdsl_engine/session.py

@@ -66,6 +66,7 @@ class GeometryAdapter(Protocol):
     def cut(self, body: Any, tool: Any) -> Any: ...
     def cut_with_topology_delta(self, body: Any, tool: Any) -> tuple[Any, TopologyDelta | None]: ...
     def sphere(self, radius_mm: float, center_mm: Vector3) -> Any: ...
+    def cylinder_with_topology_delta(self, radius_mm: float, height_mm: float, axis: AxisSpec | None = None) -> tuple[Any, TopologyDelta]: ...
     def thread_solid(self, spec: ThreadSpec) -> Any: ...
     def bend_solid(self, spec: BendSpec) -> Any: ...
     def gear_solid(self, spec: GearSpec) -> Any: ...
@@ -184,11 +185,15 @@ class ExecutionSession:
             binding_feature_id = selector.get("binding_feature_id")
             active_body_id = None if binding_feature_id and self.body_id != f"body:{binding_feature_id}" else self.body_id
             resolved = [self._record_selector_resolution(self.topology.resolve(selector, active_body_id=active_body_id))]
-        failures = [item for item in resolved if item.status != "resolved" or item.record is None]
+        failures = [item for item in resolved if item.status != "resolved" or (item.record is None and not item.records)]
         if failures:
             detail = failures[0].diagnostic.message if failures[0].diagnostic else "intersection selector component was not resolved"
             raise FeatureExecutionError("intersection_selector_component_unresolved", detail)
-        return [item.record for item in resolved if item.record is not None]
+        return [
+            record
+            for item in resolved
+            for record in (item.records or ((item.record,) if item.record is not None else ()))
+        ]
 
     def _resolve_intersection_vertex(self, selector: dict[str, Any]) -> SelectorResolution:
         components = selector.get("intersection_of")