Fixes #7507: Fix: Prevent spatial element placement corruption during drawing activation

sync_references was syncing spatial element placements FROM Blender TO IFC,
corrupting their correct positions. Spatial elements (storeys, spaces,
buildings) often have Blender objects at Z=0 for modeling convenience, but
their IFC placements store absolute positions.

Solution: Skip syncing placements for IfcSpatialElement and IfcGrid types,
as their IFC placement is the source of truth.

Fixes storey elevation corruption during SECTION_LEVEL annotation generation.

src/bonsai/bonsai/core/drawing.py

@@ -487,12 +487,29 @@ def sync_references(
     potential_reference_elements = drawing_tool.get_potential_reference_elements(drawing)
 
     for element in potential_reference_elements:
+        # Skip spatial elements - their IFC placement is the source of truth
+        if element.is_a("IfcSpatialElement"): 
+            continue
+        
+        # Skip grids - their IFC placement is the source of truth
+        if element.is_a("IfcGrid") or element.is_a("IfcGridAxis"):
+            continue
+        
         if (obj := ifc.get_object(element)) and ifc.is_moved(obj):
             drawing_tool.sync_object_placement(obj)
 
     for element in drawing_tool.get_group_elements(group):
         if not drawing_tool.is_auto_annotation(element):
             continue
+ 
+        # Skip spatial elements - should never sync their placement
+        if element.is_a("IfcSpatialElement"):
+            continue
+            
+        # Skip grids
+        if element.is_a("IfcGrid") or element.is_a("IfcGridAxis"):
+            continue  
+        
         if (obj := ifc.get_object(element)) and ifc.is_moved(obj):
             drawing_tool.sync_object_placement(obj)
         if not (reference_element := drawing_tool.get_assigned_product(element)):