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/history.rs

@@ -685,15 +685,15 @@ impl OpenCADStudio {
     /// Add is delta-safe when its layer and XData application IDs already exist
     /// and it creates no block records.
     pub(super) fn delta_add_safe(&self, i: usize, entity: &EntityType) -> bool {
-        if matches!(
-            entity,
-            EntityType::Block(_)
-                | EntityType::BlockEnd(_)
-                | EntityType::Extended(codec::entities::ExtendedEntity {
-                    data: codec::entities::ExtendedEntityData::SectionObject(_),
-                    ..
-                })
-        ) {
+        if matches!(entity, EntityType::Block(_) | EntityType::BlockEnd(_))
+            || matches!(
+                entity,
+                EntityType::Extended(extended) if matches!(
+                    extended.data,
+                    codec::entities::ExtendedEntityData::SectionObject(_)
+                )
+            )
+        {
             return false;
         }
         let layer = entity.common().layer.clone();