feat: extract workflow bbox services phase 3

backend/app/domains/pipeline/tasks/render_thumbnail.py

@@ -117,7 +117,7 @@ def render_step_thumbnail(self, cad_file_id: str):
     # ── Post-render: bbox + sharp edges + materials (single session) ──────
     try:
         from app.models.cad_file import CadFile
-        from app.domains.pipeline.tasks.extract_metadata import _bbox_from_glb, _bbox_from_step_cadquery
+        from app.domains.rendering.workflow_runtime_services import resolve_cad_bbox
 
         with _pipeline_session(_tenant_id) as session:
             cad = session.get(CadFile, cad_file_id)
@@ -131,7 +131,7 @@ def render_step_thumbnail(self, cad_file_id: str):
                 if step_path and not attrs.get("dimensions_mm"):
                     _step = Path(step_path)
                     _glb = _step.parent / f"{_step.stem}_thumbnail.glb"
-                    bbox_data = _bbox_from_glb(str(_glb)) or _bbox_from_step_cadquery(step_path)
+                    bbox_data = resolve_cad_bbox(step_path, glb_path=str(_glb)).bbox_data
                     if bbox_data:
                         cad.mesh_attributes = {**attrs, **bbox_data}
                         attrs = cad.mesh_attributes