Join a flange flush with a bent, tapered loft's end where the retry fails (#1391) (#1556)

Thanks @gvocale.

crates/engine/src/tests.rs

@@ -307,6 +307,7 @@ mod blend_fit;
 mod boolean_diagnostics;
 mod component_frames;
 mod curved_seam_round;
+mod flush_join_loft;
 mod gltf_import;
 mod import_component;
 mod large_step_import;