Set filter for is_3D to True after convert 2d to 3d task

Author: jluethi

src/fractal_helper_tasks/convert_2D_segmentation_to_3D.py

@@ -247,10 +247,15 @@ def convert_2D_segmentation_to_3D(
                 table_attrs=table_attrs,
             )
 
-    # FIXME: Set a filter for is_3D = True
-
     logger.info("Finished 2D to 3D conversion")
 
+    output_dict = dict(
+        filters=dict(
+            types=dict(is_3D=True),
+        )
+    )
+    return output_dict
+
 
 if __name__ == "__main__":
     from fractal_tasks_core.tasks._utils import run_fractal_task