smlib: drafting a cylinder's side runs on solidcore (solidcore#1606, fixed by #1611)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MNXLXkZLQ6T7TSi4wswcmk

crates/smlib/src/core/offset_tests.rs

@@ -443,7 +443,7 @@ cases!(
     draft_one_side,
     draft_one_side_out,
     draft_one_side_hinged_at_the_top,
-    draft_a_curved_face: ignore = "solidcore#1606: Cone::lean_cylinder keeps its cylinder flag, so under cylinder_rebuild_mean_radius the rebuild refuses the cone",
+    draft_a_curved_face,
     draft_a_face_across_the_pull,
 );