chore: fix experimental blob ObjRefDtype (#1335)

GarrettWu · web-flow · commit e2382b2a9852 · 2025-01-28T22:06:13.000-08:00
diff --git a/bigframes/dtypes.py b/bigframes/dtypes.py
@@ -79,7 +79,7 @@
             ),
             pa.field(
                 "details",
-                pa.large_string(),  # JSON
+                db_dtypes.JSONArrowType(),
             ),
         )
     )
