chore: bump codec d28fd71, kernel a03e4f0, graph 79bdc4b

Codec: PRs #71-#74 merged (MPOLYGON layout, multiline ATTDEF/ATTRIB DXF,
DXF MATERIAL/ACSH matrix, restorable SAT/SAB + history roots) and issues
#55 #64-#69 fixed. EntityType now boxes Surface, Extended, Table,
MultiLeader and Helix (2344 B -> 848 B per entity): construction sites
wrap in Box, the entity traits forward through Box, and the python
plugin generator converts with into(). Kernel: PR #70 (cuboid ring
winding).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/app/commands/point_cloud.rs

@@ -163,10 +163,10 @@ impl OpenCADStudio {
             elevation_as_gradient: false,
             croppings: Vec::new(),
         };
-        let entity = codec::EntityType::Extended(codec::entities::ExtendedEntity {
+        let entity = codec::EntityType::Extended(Box::new(codec::entities::ExtendedEntity {
             common: codec::entities::EntityCommon::new(),
             data: codec::entities::ExtendedEntityData::PointCloudEx(data),
-        });
+        }));
         if let Some(cloud) = self.commit_entity_handle(entity) {
             // The reactor, owned by the cloud, tells the definition who uses it.
             let document = &mut self.tabs[i].scene.document;